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1da177e4 LT |
1 | /* |
2 | * super.c - NTFS kernel super block handling. Part of the Linux-NTFS project. | |
3 | * | |
8331191e | 4 | * Copyright (c) 2001-2007 Anton Altaparmakov |
1da177e4 LT |
5 | * Copyright (c) 2001,2002 Richard Russon |
6 | * | |
7 | * This program/include file is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program/include file is distributed in the hope that it will be | |
13 | * useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
14 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program (in the main directory of the Linux-NTFS | |
19 | * distribution in the file COPYING); if not, write to the Free Software | |
20 | * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | #include <linux/stddef.h> | |
24 | #include <linux/init.h> | |
78af34f0 | 25 | #include <linux/slab.h> |
1da177e4 LT |
26 | #include <linux/string.h> |
27 | #include <linux/spinlock.h> | |
e1defc4f | 28 | #include <linux/blkdev.h> /* For bdev_logical_block_size(). */ |
1da177e4 LT |
29 | #include <linux/backing-dev.h> |
30 | #include <linux/buffer_head.h> | |
31 | #include <linux/vfs.h> | |
32 | #include <linux/moduleparam.h> | |
33 | #include <linux/smp_lock.h> | |
c4af9644 | 34 | #include <linux/bitmap.h> |
1da177e4 LT |
35 | |
36 | #include "sysctl.h" | |
37 | #include "logfile.h" | |
38 | #include "quota.h" | |
3f2faef0 | 39 | #include "usnjrnl.h" |
1da177e4 LT |
40 | #include "dir.h" |
41 | #include "debug.h" | |
42 | #include "index.h" | |
a9185b41 | 43 | #include "inode.h" |
1da177e4 | 44 | #include "aops.h" |
b0d2374d | 45 | #include "layout.h" |
1da177e4 LT |
46 | #include "malloc.h" |
47 | #include "ntfs.h" | |
48 | ||
c002f425 | 49 | /* Number of mounted filesystems which have compression enabled. */ |
1da177e4 LT |
50 | static unsigned long ntfs_nr_compression_users; |
51 | ||
52 | /* A global default upcase table and a corresponding reference count. */ | |
53 | static ntfschar *default_upcase = NULL; | |
54 | static unsigned long ntfs_nr_upcase_users = 0; | |
55 | ||
56 | /* Error constants/strings used in inode.c::ntfs_show_options(). */ | |
57 | typedef enum { | |
58 | /* One of these must be present, default is ON_ERRORS_CONTINUE. */ | |
59 | ON_ERRORS_PANIC = 0x01, | |
60 | ON_ERRORS_REMOUNT_RO = 0x02, | |
61 | ON_ERRORS_CONTINUE = 0x04, | |
62 | /* Optional, can be combined with any of the above. */ | |
63 | ON_ERRORS_RECOVER = 0x10, | |
64 | } ON_ERRORS_ACTIONS; | |
65 | ||
66 | const option_t on_errors_arr[] = { | |
67 | { ON_ERRORS_PANIC, "panic" }, | |
68 | { ON_ERRORS_REMOUNT_RO, "remount-ro", }, | |
69 | { ON_ERRORS_CONTINUE, "continue", }, | |
70 | { ON_ERRORS_RECOVER, "recover" }, | |
71 | { 0, NULL } | |
72 | }; | |
73 | ||
74 | /** | |
75 | * simple_getbool - | |
76 | * | |
77 | * Copied from old ntfs driver (which copied from vfat driver). | |
78 | */ | |
c49c3111 | 79 | static int simple_getbool(char *s, bool *setval) |
1da177e4 LT |
80 | { |
81 | if (s) { | |
82 | if (!strcmp(s, "1") || !strcmp(s, "yes") || !strcmp(s, "true")) | |
c49c3111 | 83 | *setval = true; |
1da177e4 LT |
84 | else if (!strcmp(s, "0") || !strcmp(s, "no") || |
85 | !strcmp(s, "false")) | |
c49c3111 | 86 | *setval = false; |
1da177e4 LT |
87 | else |
88 | return 0; | |
89 | } else | |
c49c3111 | 90 | *setval = true; |
1da177e4 LT |
91 | return 1; |
92 | } | |
93 | ||
94 | /** | |
95 | * parse_options - parse the (re)mount options | |
96 | * @vol: ntfs volume | |
97 | * @opt: string containing the (re)mount options | |
98 | * | |
99 | * Parse the recognized options in @opt for the ntfs volume described by @vol. | |
100 | */ | |
c49c3111 | 101 | static bool parse_options(ntfs_volume *vol, char *opt) |
1da177e4 LT |
102 | { |
103 | char *p, *v, *ov; | |
104 | static char *utf8 = "utf8"; | |
105 | int errors = 0, sloppy = 0; | |
106 | uid_t uid = (uid_t)-1; | |
107 | gid_t gid = (gid_t)-1; | |
108 | mode_t fmask = (mode_t)-1, dmask = (mode_t)-1; | |
109 | int mft_zone_multiplier = -1, on_errors = -1; | |
c002f425 | 110 | int show_sys_files = -1, case_sensitive = -1, disable_sparse = -1; |
1da177e4 LT |
111 | struct nls_table *nls_map = NULL, *old_nls; |
112 | ||
113 | /* I am lazy... (-8 */ | |
114 | #define NTFS_GETOPT_WITH_DEFAULT(option, variable, default_value) \ | |
115 | if (!strcmp(p, option)) { \ | |
116 | if (!v || !*v) \ | |
117 | variable = default_value; \ | |
118 | else { \ | |
119 | variable = simple_strtoul(ov = v, &v, 0); \ | |
120 | if (*v) \ | |
121 | goto needs_val; \ | |
122 | } \ | |
123 | } | |
124 | #define NTFS_GETOPT(option, variable) \ | |
125 | if (!strcmp(p, option)) { \ | |
126 | if (!v || !*v) \ | |
127 | goto needs_arg; \ | |
128 | variable = simple_strtoul(ov = v, &v, 0); \ | |
129 | if (*v) \ | |
130 | goto needs_val; \ | |
131 | } | |
5d46770f AA |
132 | #define NTFS_GETOPT_OCTAL(option, variable) \ |
133 | if (!strcmp(p, option)) { \ | |
134 | if (!v || !*v) \ | |
135 | goto needs_arg; \ | |
136 | variable = simple_strtoul(ov = v, &v, 8); \ | |
137 | if (*v) \ | |
138 | goto needs_val; \ | |
139 | } | |
1da177e4 LT |
140 | #define NTFS_GETOPT_BOOL(option, variable) \ |
141 | if (!strcmp(p, option)) { \ | |
c49c3111 | 142 | bool val; \ |
1da177e4 LT |
143 | if (!simple_getbool(v, &val)) \ |
144 | goto needs_bool; \ | |
145 | variable = val; \ | |
146 | } | |
147 | #define NTFS_GETOPT_OPTIONS_ARRAY(option, variable, opt_array) \ | |
148 | if (!strcmp(p, option)) { \ | |
149 | int _i; \ | |
150 | if (!v || !*v) \ | |
151 | goto needs_arg; \ | |
152 | ov = v; \ | |
153 | if (variable == -1) \ | |
154 | variable = 0; \ | |
155 | for (_i = 0; opt_array[_i].str && *opt_array[_i].str; _i++) \ | |
156 | if (!strcmp(opt_array[_i].str, v)) { \ | |
157 | variable |= opt_array[_i].val; \ | |
158 | break; \ | |
159 | } \ | |
160 | if (!opt_array[_i].str || !*opt_array[_i].str) \ | |
161 | goto needs_val; \ | |
162 | } | |
163 | if (!opt || !*opt) | |
164 | goto no_mount_options; | |
165 | ntfs_debug("Entering with mount options string: %s", opt); | |
166 | while ((p = strsep(&opt, ","))) { | |
167 | if ((v = strchr(p, '='))) | |
168 | *v++ = 0; | |
169 | NTFS_GETOPT("uid", uid) | |
170 | else NTFS_GETOPT("gid", gid) | |
5d46770f AA |
171 | else NTFS_GETOPT_OCTAL("umask", fmask = dmask) |
172 | else NTFS_GETOPT_OCTAL("fmask", fmask) | |
173 | else NTFS_GETOPT_OCTAL("dmask", dmask) | |
1da177e4 | 174 | else NTFS_GETOPT("mft_zone_multiplier", mft_zone_multiplier) |
c49c3111 | 175 | else NTFS_GETOPT_WITH_DEFAULT("sloppy", sloppy, true) |
1da177e4 LT |
176 | else NTFS_GETOPT_BOOL("show_sys_files", show_sys_files) |
177 | else NTFS_GETOPT_BOOL("case_sensitive", case_sensitive) | |
c002f425 | 178 | else NTFS_GETOPT_BOOL("disable_sparse", disable_sparse) |
1da177e4 LT |
179 | else NTFS_GETOPT_OPTIONS_ARRAY("errors", on_errors, |
180 | on_errors_arr) | |
181 | else if (!strcmp(p, "posix") || !strcmp(p, "show_inodes")) | |
182 | ntfs_warning(vol->sb, "Ignoring obsolete option %s.", | |
183 | p); | |
184 | else if (!strcmp(p, "nls") || !strcmp(p, "iocharset")) { | |
185 | if (!strcmp(p, "iocharset")) | |
186 | ntfs_warning(vol->sb, "Option iocharset is " | |
187 | "deprecated. Please use " | |
188 | "option nls=<charsetname> in " | |
189 | "the future."); | |
190 | if (!v || !*v) | |
191 | goto needs_arg; | |
192 | use_utf8: | |
193 | old_nls = nls_map; | |
194 | nls_map = load_nls(v); | |
195 | if (!nls_map) { | |
196 | if (!old_nls) { | |
197 | ntfs_error(vol->sb, "NLS character set " | |
198 | "%s not found.", v); | |
c49c3111 | 199 | return false; |
1da177e4 LT |
200 | } |
201 | ntfs_error(vol->sb, "NLS character set %s not " | |
202 | "found. Using previous one %s.", | |
203 | v, old_nls->charset); | |
204 | nls_map = old_nls; | |
205 | } else /* nls_map */ { | |
6d729e44 | 206 | unload_nls(old_nls); |
1da177e4 LT |
207 | } |
208 | } else if (!strcmp(p, "utf8")) { | |
c49c3111 | 209 | bool val = false; |
1da177e4 LT |
210 | ntfs_warning(vol->sb, "Option utf8 is no longer " |
211 | "supported, using option nls=utf8. Please " | |
212 | "use option nls=utf8 in the future and " | |
213 | "make sure utf8 is compiled either as a " | |
214 | "module or into the kernel."); | |
215 | if (!v || !*v) | |
c49c3111 | 216 | val = true; |
1da177e4 LT |
217 | else if (!simple_getbool(v, &val)) |
218 | goto needs_bool; | |
219 | if (val) { | |
220 | v = utf8; | |
221 | goto use_utf8; | |
222 | } | |
223 | } else { | |
224 | ntfs_error(vol->sb, "Unrecognized mount option %s.", p); | |
225 | if (errors < INT_MAX) | |
226 | errors++; | |
227 | } | |
228 | #undef NTFS_GETOPT_OPTIONS_ARRAY | |
229 | #undef NTFS_GETOPT_BOOL | |
230 | #undef NTFS_GETOPT | |
231 | #undef NTFS_GETOPT_WITH_DEFAULT | |
232 | } | |
233 | no_mount_options: | |
234 | if (errors && !sloppy) | |
c49c3111 | 235 | return false; |
1da177e4 LT |
236 | if (sloppy) |
237 | ntfs_warning(vol->sb, "Sloppy option given. Ignoring " | |
238 | "unrecognized mount option(s) and continuing."); | |
239 | /* Keep this first! */ | |
240 | if (on_errors != -1) { | |
241 | if (!on_errors) { | |
242 | ntfs_error(vol->sb, "Invalid errors option argument " | |
243 | "or bug in options parser."); | |
c49c3111 | 244 | return false; |
1da177e4 LT |
245 | } |
246 | } | |
247 | if (nls_map) { | |
248 | if (vol->nls_map && vol->nls_map != nls_map) { | |
249 | ntfs_error(vol->sb, "Cannot change NLS character set " | |
250 | "on remount."); | |
c49c3111 | 251 | return false; |
1da177e4 LT |
252 | } /* else (!vol->nls_map) */ |
253 | ntfs_debug("Using NLS character set %s.", nls_map->charset); | |
254 | vol->nls_map = nls_map; | |
255 | } else /* (!nls_map) */ { | |
256 | if (!vol->nls_map) { | |
257 | vol->nls_map = load_nls_default(); | |
258 | if (!vol->nls_map) { | |
259 | ntfs_error(vol->sb, "Failed to load default " | |
260 | "NLS character set."); | |
c49c3111 | 261 | return false; |
1da177e4 LT |
262 | } |
263 | ntfs_debug("Using default NLS character set (%s).", | |
264 | vol->nls_map->charset); | |
265 | } | |
266 | } | |
267 | if (mft_zone_multiplier != -1) { | |
268 | if (vol->mft_zone_multiplier && vol->mft_zone_multiplier != | |
269 | mft_zone_multiplier) { | |
270 | ntfs_error(vol->sb, "Cannot change mft_zone_multiplier " | |
271 | "on remount."); | |
c49c3111 | 272 | return false; |
1da177e4 LT |
273 | } |
274 | if (mft_zone_multiplier < 1 || mft_zone_multiplier > 4) { | |
275 | ntfs_error(vol->sb, "Invalid mft_zone_multiplier. " | |
276 | "Using default value, i.e. 1."); | |
277 | mft_zone_multiplier = 1; | |
278 | } | |
279 | vol->mft_zone_multiplier = mft_zone_multiplier; | |
280 | } | |
281 | if (!vol->mft_zone_multiplier) | |
282 | vol->mft_zone_multiplier = 1; | |
283 | if (on_errors != -1) | |
284 | vol->on_errors = on_errors; | |
285 | if (!vol->on_errors || vol->on_errors == ON_ERRORS_RECOVER) | |
286 | vol->on_errors |= ON_ERRORS_CONTINUE; | |
287 | if (uid != (uid_t)-1) | |
288 | vol->uid = uid; | |
289 | if (gid != (gid_t)-1) | |
290 | vol->gid = gid; | |
291 | if (fmask != (mode_t)-1) | |
292 | vol->fmask = fmask; | |
293 | if (dmask != (mode_t)-1) | |
294 | vol->dmask = dmask; | |
295 | if (show_sys_files != -1) { | |
296 | if (show_sys_files) | |
297 | NVolSetShowSystemFiles(vol); | |
298 | else | |
299 | NVolClearShowSystemFiles(vol); | |
300 | } | |
301 | if (case_sensitive != -1) { | |
302 | if (case_sensitive) | |
303 | NVolSetCaseSensitive(vol); | |
304 | else | |
305 | NVolClearCaseSensitive(vol); | |
306 | } | |
c002f425 AA |
307 | if (disable_sparse != -1) { |
308 | if (disable_sparse) | |
309 | NVolClearSparseEnabled(vol); | |
310 | else { | |
311 | if (!NVolSparseEnabled(vol) && | |
312 | vol->major_ver && vol->major_ver < 3) | |
313 | ntfs_warning(vol->sb, "Not enabling sparse " | |
314 | "support due to NTFS volume " | |
315 | "version %i.%i (need at least " | |
316 | "version 3.0).", vol->major_ver, | |
317 | vol->minor_ver); | |
318 | else | |
319 | NVolSetSparseEnabled(vol); | |
320 | } | |
321 | } | |
c49c3111 | 322 | return true; |
1da177e4 LT |
323 | needs_arg: |
324 | ntfs_error(vol->sb, "The %s option requires an argument.", p); | |
c49c3111 | 325 | return false; |
1da177e4 LT |
326 | needs_bool: |
327 | ntfs_error(vol->sb, "The %s option requires a boolean argument.", p); | |
c49c3111 | 328 | return false; |
1da177e4 LT |
329 | needs_val: |
330 | ntfs_error(vol->sb, "Invalid %s option argument: %s", p, ov); | |
c49c3111 | 331 | return false; |
1da177e4 LT |
332 | } |
333 | ||
334 | #ifdef NTFS_RW | |
335 | ||
336 | /** | |
337 | * ntfs_write_volume_flags - write new flags to the volume information flags | |
338 | * @vol: ntfs volume on which to modify the flags | |
339 | * @flags: new flags value for the volume information flags | |
340 | * | |
341 | * Internal function. You probably want to use ntfs_{set,clear}_volume_flags() | |
342 | * instead (see below). | |
343 | * | |
344 | * Replace the volume information flags on the volume @vol with the value | |
345 | * supplied in @flags. Note, this overwrites the volume information flags, so | |
346 | * make sure to combine the flags you want to modify with the old flags and use | |
347 | * the result when calling ntfs_write_volume_flags(). | |
348 | * | |
349 | * Return 0 on success and -errno on error. | |
350 | */ | |
351 | static int ntfs_write_volume_flags(ntfs_volume *vol, const VOLUME_FLAGS flags) | |
352 | { | |
353 | ntfs_inode *ni = NTFS_I(vol->vol_ino); | |
354 | MFT_RECORD *m; | |
355 | VOLUME_INFORMATION *vi; | |
356 | ntfs_attr_search_ctx *ctx; | |
357 | int err; | |
358 | ||
359 | ntfs_debug("Entering, old flags = 0x%x, new flags = 0x%x.", | |
360 | le16_to_cpu(vol->vol_flags), le16_to_cpu(flags)); | |
361 | if (vol->vol_flags == flags) | |
362 | goto done; | |
363 | BUG_ON(!ni); | |
364 | m = map_mft_record(ni); | |
365 | if (IS_ERR(m)) { | |
366 | err = PTR_ERR(m); | |
367 | goto err_out; | |
368 | } | |
369 | ctx = ntfs_attr_get_search_ctx(ni, m); | |
370 | if (!ctx) { | |
371 | err = -ENOMEM; | |
372 | goto put_unm_err_out; | |
373 | } | |
374 | err = ntfs_attr_lookup(AT_VOLUME_INFORMATION, NULL, 0, 0, 0, NULL, 0, | |
375 | ctx); | |
376 | if (err) | |
377 | goto put_unm_err_out; | |
378 | vi = (VOLUME_INFORMATION*)((u8*)ctx->attr + | |
379 | le16_to_cpu(ctx->attr->data.resident.value_offset)); | |
380 | vol->vol_flags = vi->flags = flags; | |
381 | flush_dcache_mft_record_page(ctx->ntfs_ino); | |
382 | mark_mft_record_dirty(ctx->ntfs_ino); | |
383 | ntfs_attr_put_search_ctx(ctx); | |
384 | unmap_mft_record(ni); | |
385 | done: | |
386 | ntfs_debug("Done."); | |
387 | return 0; | |
388 | put_unm_err_out: | |
389 | if (ctx) | |
390 | ntfs_attr_put_search_ctx(ctx); | |
391 | unmap_mft_record(ni); | |
392 | err_out: | |
393 | ntfs_error(vol->sb, "Failed with error code %i.", -err); | |
394 | return err; | |
395 | } | |
396 | ||
397 | /** | |
398 | * ntfs_set_volume_flags - set bits in the volume information flags | |
399 | * @vol: ntfs volume on which to modify the flags | |
400 | * @flags: flags to set on the volume | |
401 | * | |
402 | * Set the bits in @flags in the volume information flags on the volume @vol. | |
403 | * | |
404 | * Return 0 on success and -errno on error. | |
405 | */ | |
406 | static inline int ntfs_set_volume_flags(ntfs_volume *vol, VOLUME_FLAGS flags) | |
407 | { | |
408 | flags &= VOLUME_FLAGS_MASK; | |
409 | return ntfs_write_volume_flags(vol, vol->vol_flags | flags); | |
410 | } | |
411 | ||
412 | /** | |
413 | * ntfs_clear_volume_flags - clear bits in the volume information flags | |
414 | * @vol: ntfs volume on which to modify the flags | |
415 | * @flags: flags to clear on the volume | |
416 | * | |
417 | * Clear the bits in @flags in the volume information flags on the volume @vol. | |
418 | * | |
419 | * Return 0 on success and -errno on error. | |
420 | */ | |
421 | static inline int ntfs_clear_volume_flags(ntfs_volume *vol, VOLUME_FLAGS flags) | |
422 | { | |
423 | flags &= VOLUME_FLAGS_MASK; | |
424 | flags = vol->vol_flags & cpu_to_le16(~le16_to_cpu(flags)); | |
425 | return ntfs_write_volume_flags(vol, flags); | |
426 | } | |
427 | ||
428 | #endif /* NTFS_RW */ | |
429 | ||
430 | /** | |
431 | * ntfs_remount - change the mount options of a mounted ntfs filesystem | |
432 | * @sb: superblock of mounted ntfs filesystem | |
433 | * @flags: remount flags | |
434 | * @opt: remount options string | |
435 | * | |
436 | * Change the mount options of an already mounted ntfs filesystem. | |
437 | * | |
438 | * NOTE: The VFS sets the @sb->s_flags remount flags to @flags after | |
439 | * ntfs_remount() returns successfully (i.e. returns 0). Otherwise, | |
440 | * @sb->s_flags are not changed. | |
441 | */ | |
442 | static int ntfs_remount(struct super_block *sb, int *flags, char *opt) | |
443 | { | |
444 | ntfs_volume *vol = NTFS_SB(sb); | |
445 | ||
446 | ntfs_debug("Entering with remount options string: %s", opt); | |
337eb00a AIB |
447 | |
448 | lock_kernel(); | |
1da177e4 | 449 | #ifndef NTFS_RW |
24a44dca CH |
450 | /* For read-only compiled driver, enforce read-only flag. */ |
451 | *flags |= MS_RDONLY; | |
1da177e4 LT |
452 | #else /* NTFS_RW */ |
453 | /* | |
454 | * For the read-write compiled driver, if we are remounting read-write, | |
455 | * make sure there are no volume errors and that no unsupported volume | |
456 | * flags are set. Also, empty the logfile journal as it would become | |
457 | * stale as soon as something is written to the volume and mark the | |
458 | * volume dirty so that chkdsk is run if the volume is not umounted | |
459 | * cleanly. Finally, mark the quotas out of date so Windows rescans | |
460 | * the volume on boot and updates them. | |
461 | * | |
462 | * When remounting read-only, mark the volume clean if no volume errors | |
463 | * have occured. | |
464 | */ | |
465 | if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) { | |
466 | static const char *es = ". Cannot remount read-write."; | |
467 | ||
468 | /* Remounting read-write. */ | |
469 | if (NVolErrors(vol)) { | |
470 | ntfs_error(sb, "Volume has errors and is read-only%s", | |
471 | es); | |
337eb00a | 472 | unlock_kernel(); |
1da177e4 LT |
473 | return -EROFS; |
474 | } | |
475 | if (vol->vol_flags & VOLUME_IS_DIRTY) { | |
476 | ntfs_error(sb, "Volume is dirty and read-only%s", es); | |
337eb00a | 477 | unlock_kernel(); |
1da177e4 LT |
478 | return -EROFS; |
479 | } | |
1cf3109f AA |
480 | if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) { |
481 | ntfs_error(sb, "Volume has been modified by chkdsk " | |
482 | "and is read-only%s", es); | |
337eb00a | 483 | unlock_kernel(); |
1cf3109f AA |
484 | return -EROFS; |
485 | } | |
1da177e4 | 486 | if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) { |
1cf3109f AA |
487 | ntfs_error(sb, "Volume has unsupported flags set " |
488 | "(0x%x) and is read-only%s", | |
489 | (unsigned)le16_to_cpu(vol->vol_flags), | |
490 | es); | |
337eb00a | 491 | unlock_kernel(); |
1da177e4 LT |
492 | return -EROFS; |
493 | } | |
494 | if (ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) { | |
495 | ntfs_error(sb, "Failed to set dirty bit in volume " | |
496 | "information flags%s", es); | |
337eb00a | 497 | unlock_kernel(); |
1da177e4 LT |
498 | return -EROFS; |
499 | } | |
500 | #if 0 | |
501 | // TODO: Enable this code once we start modifying anything that | |
502 | // is different between NTFS 1.2 and 3.x... | |
503 | /* Set NT4 compatibility flag on newer NTFS version volumes. */ | |
504 | if ((vol->major_ver > 1)) { | |
505 | if (ntfs_set_volume_flags(vol, VOLUME_MOUNTED_ON_NT4)) { | |
506 | ntfs_error(sb, "Failed to set NT4 " | |
507 | "compatibility flag%s", es); | |
508 | NVolSetErrors(vol); | |
509 | return -EROFS; | |
510 | } | |
511 | } | |
512 | #endif | |
513 | if (!ntfs_empty_logfile(vol->logfile_ino)) { | |
514 | ntfs_error(sb, "Failed to empty journal $LogFile%s", | |
515 | es); | |
516 | NVolSetErrors(vol); | |
337eb00a | 517 | unlock_kernel(); |
1da177e4 LT |
518 | return -EROFS; |
519 | } | |
520 | if (!ntfs_mark_quotas_out_of_date(vol)) { | |
521 | ntfs_error(sb, "Failed to mark quotas out of date%s", | |
522 | es); | |
523 | NVolSetErrors(vol); | |
337eb00a | 524 | unlock_kernel(); |
1da177e4 LT |
525 | return -EROFS; |
526 | } | |
3f2faef0 AA |
527 | if (!ntfs_stamp_usnjrnl(vol)) { |
528 | ntfs_error(sb, "Failed to stamp transation log " | |
529 | "($UsnJrnl)%s", es); | |
530 | NVolSetErrors(vol); | |
337eb00a | 531 | unlock_kernel(); |
3f2faef0 AA |
532 | return -EROFS; |
533 | } | |
1da177e4 LT |
534 | } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) { |
535 | /* Remounting read-only. */ | |
536 | if (!NVolErrors(vol)) { | |
537 | if (ntfs_clear_volume_flags(vol, VOLUME_IS_DIRTY)) | |
538 | ntfs_warning(sb, "Failed to clear dirty bit " | |
539 | "in volume information " | |
540 | "flags. Run chkdsk."); | |
541 | } | |
542 | } | |
543 | #endif /* NTFS_RW */ | |
544 | ||
545 | // TODO: Deal with *flags. | |
546 | ||
337eb00a AIB |
547 | if (!parse_options(vol, opt)) { |
548 | unlock_kernel(); | |
1da177e4 | 549 | return -EINVAL; |
337eb00a AIB |
550 | } |
551 | unlock_kernel(); | |
1da177e4 LT |
552 | ntfs_debug("Done."); |
553 | return 0; | |
554 | } | |
555 | ||
556 | /** | |
557 | * is_boot_sector_ntfs - check whether a boot sector is a valid NTFS boot sector | |
558 | * @sb: Super block of the device to which @b belongs. | |
559 | * @b: Boot sector of device @sb to check. | |
c49c3111 | 560 | * @silent: If 'true', all output will be silenced. |
1da177e4 LT |
561 | * |
562 | * is_boot_sector_ntfs() checks whether the boot sector @b is a valid NTFS boot | |
c49c3111 | 563 | * sector. Returns 'true' if it is valid and 'false' if not. |
1da177e4 LT |
564 | * |
565 | * @sb is only needed for warning/error output, i.e. it can be NULL when silent | |
c49c3111 | 566 | * is 'true'. |
1da177e4 | 567 | */ |
c49c3111 RK |
568 | static bool is_boot_sector_ntfs(const struct super_block *sb, |
569 | const NTFS_BOOT_SECTOR *b, const bool silent) | |
1da177e4 LT |
570 | { |
571 | /* | |
572 | * Check that checksum == sum of u32 values from b to the checksum | |
b0d2374d AA |
573 | * field. If checksum is zero, no checking is done. We will work when |
574 | * the checksum test fails, since some utilities update the boot sector | |
575 | * ignoring the checksum which leaves the checksum out-of-date. We | |
576 | * report a warning if this is the case. | |
1da177e4 | 577 | */ |
b0d2374d | 578 | if ((void*)b < (void*)&b->checksum && b->checksum && !silent) { |
1da177e4 LT |
579 | le32 *u; |
580 | u32 i; | |
581 | ||
582 | for (i = 0, u = (le32*)b; u < (le32*)(&b->checksum); ++u) | |
583 | i += le32_to_cpup(u); | |
584 | if (le32_to_cpu(b->checksum) != i) | |
b0d2374d | 585 | ntfs_warning(sb, "Invalid boot sector checksum."); |
1da177e4 LT |
586 | } |
587 | /* Check OEMidentifier is "NTFS " */ | |
588 | if (b->oem_id != magicNTFS) | |
589 | goto not_ntfs; | |
590 | /* Check bytes per sector value is between 256 and 4096. */ | |
591 | if (le16_to_cpu(b->bpb.bytes_per_sector) < 0x100 || | |
592 | le16_to_cpu(b->bpb.bytes_per_sector) > 0x1000) | |
593 | goto not_ntfs; | |
594 | /* Check sectors per cluster value is valid. */ | |
595 | switch (b->bpb.sectors_per_cluster) { | |
596 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: case 128: | |
597 | break; | |
598 | default: | |
599 | goto not_ntfs; | |
600 | } | |
7fafb8b6 | 601 | /* Check the cluster size is not above the maximum (64kiB). */ |
1da177e4 | 602 | if ((u32)le16_to_cpu(b->bpb.bytes_per_sector) * |
7fafb8b6 | 603 | b->bpb.sectors_per_cluster > NTFS_MAX_CLUSTER_SIZE) |
1da177e4 LT |
604 | goto not_ntfs; |
605 | /* Check reserved/unused fields are really zero. */ | |
606 | if (le16_to_cpu(b->bpb.reserved_sectors) || | |
607 | le16_to_cpu(b->bpb.root_entries) || | |
608 | le16_to_cpu(b->bpb.sectors) || | |
609 | le16_to_cpu(b->bpb.sectors_per_fat) || | |
610 | le32_to_cpu(b->bpb.large_sectors) || b->bpb.fats) | |
611 | goto not_ntfs; | |
612 | /* Check clusters per file mft record value is valid. */ | |
613 | if ((u8)b->clusters_per_mft_record < 0xe1 || | |
614 | (u8)b->clusters_per_mft_record > 0xf7) | |
615 | switch (b->clusters_per_mft_record) { | |
616 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: | |
617 | break; | |
618 | default: | |
619 | goto not_ntfs; | |
620 | } | |
621 | /* Check clusters per index block value is valid. */ | |
622 | if ((u8)b->clusters_per_index_record < 0xe1 || | |
623 | (u8)b->clusters_per_index_record > 0xf7) | |
624 | switch (b->clusters_per_index_record) { | |
625 | case 1: case 2: case 4: case 8: case 16: case 32: case 64: | |
626 | break; | |
627 | default: | |
628 | goto not_ntfs; | |
629 | } | |
630 | /* | |
631 | * Check for valid end of sector marker. We will work without it, but | |
632 | * many BIOSes will refuse to boot from a bootsector if the magic is | |
633 | * incorrect, so we emit a warning. | |
634 | */ | |
63cd8854 | 635 | if (!silent && b->end_of_sector_marker != cpu_to_le16(0xaa55)) |
1da177e4 | 636 | ntfs_warning(sb, "Invalid end of sector marker."); |
c49c3111 | 637 | return true; |
1da177e4 | 638 | not_ntfs: |
c49c3111 | 639 | return false; |
1da177e4 LT |
640 | } |
641 | ||
642 | /** | |
643 | * read_ntfs_boot_sector - read the NTFS boot sector of a device | |
644 | * @sb: super block of device to read the boot sector from | |
645 | * @silent: if true, suppress all output | |
646 | * | |
647 | * Reads the boot sector from the device and validates it. If that fails, tries | |
648 | * to read the backup boot sector, first from the end of the device a-la NT4 and | |
649 | * later and then from the middle of the device a-la NT3.51 and before. | |
650 | * | |
651 | * If a valid boot sector is found but it is not the primary boot sector, we | |
652 | * repair the primary boot sector silently (unless the device is read-only or | |
653 | * the primary boot sector is not accessible). | |
654 | * | |
655 | * NOTE: To call this function, @sb must have the fields s_dev, the ntfs super | |
656 | * block (u.ntfs_sb), nr_blocks and the device flags (s_flags) initialized | |
657 | * to their respective values. | |
658 | * | |
659 | * Return the unlocked buffer head containing the boot sector or NULL on error. | |
660 | */ | |
661 | static struct buffer_head *read_ntfs_boot_sector(struct super_block *sb, | |
662 | const int silent) | |
663 | { | |
664 | const char *read_err_str = "Unable to read %s boot sector."; | |
665 | struct buffer_head *bh_primary, *bh_backup; | |
78af34f0 | 666 | sector_t nr_blocks = NTFS_SB(sb)->nr_blocks; |
1da177e4 LT |
667 | |
668 | /* Try to read primary boot sector. */ | |
669 | if ((bh_primary = sb_bread(sb, 0))) { | |
670 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) | |
671 | bh_primary->b_data, silent)) | |
672 | return bh_primary; | |
673 | if (!silent) | |
674 | ntfs_error(sb, "Primary boot sector is invalid."); | |
675 | } else if (!silent) | |
676 | ntfs_error(sb, read_err_str, "primary"); | |
677 | if (!(NTFS_SB(sb)->on_errors & ON_ERRORS_RECOVER)) { | |
678 | if (bh_primary) | |
679 | brelse(bh_primary); | |
680 | if (!silent) | |
681 | ntfs_error(sb, "Mount option errors=recover not used. " | |
682 | "Aborting without trying to recover."); | |
683 | return NULL; | |
684 | } | |
685 | /* Try to read NT4+ backup boot sector. */ | |
686 | if ((bh_backup = sb_bread(sb, nr_blocks - 1))) { | |
687 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) | |
688 | bh_backup->b_data, silent)) | |
689 | goto hotfix_primary_boot_sector; | |
690 | brelse(bh_backup); | |
691 | } else if (!silent) | |
692 | ntfs_error(sb, read_err_str, "backup"); | |
693 | /* Try to read NT3.51- backup boot sector. */ | |
694 | if ((bh_backup = sb_bread(sb, nr_blocks >> 1))) { | |
695 | if (is_boot_sector_ntfs(sb, (NTFS_BOOT_SECTOR*) | |
696 | bh_backup->b_data, silent)) | |
697 | goto hotfix_primary_boot_sector; | |
698 | if (!silent) | |
699 | ntfs_error(sb, "Could not find a valid backup boot " | |
700 | "sector."); | |
701 | brelse(bh_backup); | |
702 | } else if (!silent) | |
703 | ntfs_error(sb, read_err_str, "backup"); | |
704 | /* We failed. Cleanup and return. */ | |
705 | if (bh_primary) | |
706 | brelse(bh_primary); | |
707 | return NULL; | |
708 | hotfix_primary_boot_sector: | |
709 | if (bh_primary) { | |
710 | /* | |
711 | * If we managed to read sector zero and the volume is not | |
712 | * read-only, copy the found, valid backup boot sector to the | |
78af34f0 AA |
713 | * primary boot sector. Note we only copy the actual boot |
714 | * sector structure, not the actual whole device sector as that | |
715 | * may be bigger and would potentially damage the $Boot system | |
716 | * file (FIXME: Would be nice to know if the backup boot sector | |
717 | * on a large sector device contains the whole boot loader or | |
718 | * just the first 512 bytes). | |
1da177e4 LT |
719 | */ |
720 | if (!(sb->s_flags & MS_RDONLY)) { | |
721 | ntfs_warning(sb, "Hot-fix: Recovering invalid primary " | |
722 | "boot sector from backup copy."); | |
723 | memcpy(bh_primary->b_data, bh_backup->b_data, | |
78af34f0 | 724 | NTFS_BLOCK_SIZE); |
1da177e4 LT |
725 | mark_buffer_dirty(bh_primary); |
726 | sync_dirty_buffer(bh_primary); | |
727 | if (buffer_uptodate(bh_primary)) { | |
728 | brelse(bh_backup); | |
729 | return bh_primary; | |
730 | } | |
731 | ntfs_error(sb, "Hot-fix: Device write error while " | |
732 | "recovering primary boot sector."); | |
733 | } else { | |
734 | ntfs_warning(sb, "Hot-fix: Recovery of primary boot " | |
735 | "sector failed: Read-only mount."); | |
736 | } | |
737 | brelse(bh_primary); | |
738 | } | |
739 | ntfs_warning(sb, "Using backup boot sector."); | |
740 | return bh_backup; | |
741 | } | |
742 | ||
743 | /** | |
744 | * parse_ntfs_boot_sector - parse the boot sector and store the data in @vol | |
745 | * @vol: volume structure to initialise with data from boot sector | |
746 | * @b: boot sector to parse | |
747 | * | |
748 | * Parse the ntfs boot sector @b and store all imporant information therein in | |
c49c3111 | 749 | * the ntfs super block @vol. Return 'true' on success and 'false' on error. |
1da177e4 | 750 | */ |
c49c3111 | 751 | static bool parse_ntfs_boot_sector(ntfs_volume *vol, const NTFS_BOOT_SECTOR *b) |
1da177e4 LT |
752 | { |
753 | unsigned int sectors_per_cluster_bits, nr_hidden_sects; | |
754 | int clusters_per_mft_record, clusters_per_index_record; | |
755 | s64 ll; | |
756 | ||
757 | vol->sector_size = le16_to_cpu(b->bpb.bytes_per_sector); | |
758 | vol->sector_size_bits = ffs(vol->sector_size) - 1; | |
759 | ntfs_debug("vol->sector_size = %i (0x%x)", vol->sector_size, | |
760 | vol->sector_size); | |
761 | ntfs_debug("vol->sector_size_bits = %i (0x%x)", vol->sector_size_bits, | |
762 | vol->sector_size_bits); | |
78af34f0 AA |
763 | if (vol->sector_size < vol->sb->s_blocksize) { |
764 | ntfs_error(vol->sb, "Sector size (%i) is smaller than the " | |
765 | "device block size (%lu). This is not " | |
766 | "supported. Sorry.", vol->sector_size, | |
767 | vol->sb->s_blocksize); | |
c49c3111 | 768 | return false; |
78af34f0 | 769 | } |
1da177e4 LT |
770 | ntfs_debug("sectors_per_cluster = 0x%x", b->bpb.sectors_per_cluster); |
771 | sectors_per_cluster_bits = ffs(b->bpb.sectors_per_cluster) - 1; | |
772 | ntfs_debug("sectors_per_cluster_bits = 0x%x", | |
773 | sectors_per_cluster_bits); | |
774 | nr_hidden_sects = le32_to_cpu(b->bpb.hidden_sectors); | |
775 | ntfs_debug("number of hidden sectors = 0x%x", nr_hidden_sects); | |
776 | vol->cluster_size = vol->sector_size << sectors_per_cluster_bits; | |
777 | vol->cluster_size_mask = vol->cluster_size - 1; | |
778 | vol->cluster_size_bits = ffs(vol->cluster_size) - 1; | |
779 | ntfs_debug("vol->cluster_size = %i (0x%x)", vol->cluster_size, | |
780 | vol->cluster_size); | |
781 | ntfs_debug("vol->cluster_size_mask = 0x%x", vol->cluster_size_mask); | |
78af34f0 AA |
782 | ntfs_debug("vol->cluster_size_bits = %i", vol->cluster_size_bits); |
783 | if (vol->cluster_size < vol->sector_size) { | |
784 | ntfs_error(vol->sb, "Cluster size (%i) is smaller than the " | |
785 | "sector size (%i). This is not supported. " | |
786 | "Sorry.", vol->cluster_size, vol->sector_size); | |
c49c3111 | 787 | return false; |
1da177e4 LT |
788 | } |
789 | clusters_per_mft_record = b->clusters_per_mft_record; | |
790 | ntfs_debug("clusters_per_mft_record = %i (0x%x)", | |
791 | clusters_per_mft_record, clusters_per_mft_record); | |
792 | if (clusters_per_mft_record > 0) | |
793 | vol->mft_record_size = vol->cluster_size << | |
794 | (ffs(clusters_per_mft_record) - 1); | |
795 | else | |
796 | /* | |
797 | * When mft_record_size < cluster_size, clusters_per_mft_record | |
798 | * = -log2(mft_record_size) bytes. mft_record_size normaly is | |
799 | * 1024 bytes, which is encoded as 0xF6 (-10 in decimal). | |
800 | */ | |
801 | vol->mft_record_size = 1 << -clusters_per_mft_record; | |
802 | vol->mft_record_size_mask = vol->mft_record_size - 1; | |
803 | vol->mft_record_size_bits = ffs(vol->mft_record_size) - 1; | |
804 | ntfs_debug("vol->mft_record_size = %i (0x%x)", vol->mft_record_size, | |
805 | vol->mft_record_size); | |
806 | ntfs_debug("vol->mft_record_size_mask = 0x%x", | |
807 | vol->mft_record_size_mask); | |
808 | ntfs_debug("vol->mft_record_size_bits = %i (0x%x)", | |
809 | vol->mft_record_size_bits, vol->mft_record_size_bits); | |
810 | /* | |
811 | * We cannot support mft record sizes above the PAGE_CACHE_SIZE since | |
812 | * we store $MFT/$DATA, the table of mft records in the page cache. | |
813 | */ | |
814 | if (vol->mft_record_size > PAGE_CACHE_SIZE) { | |
78af34f0 AA |
815 | ntfs_error(vol->sb, "Mft record size (%i) exceeds the " |
816 | "PAGE_CACHE_SIZE on your system (%lu). " | |
1da177e4 | 817 | "This is not supported. Sorry.", |
78af34f0 | 818 | vol->mft_record_size, PAGE_CACHE_SIZE); |
c49c3111 | 819 | return false; |
78af34f0 AA |
820 | } |
821 | /* We cannot support mft record sizes below the sector size. */ | |
822 | if (vol->mft_record_size < vol->sector_size) { | |
823 | ntfs_error(vol->sb, "Mft record size (%i) is smaller than the " | |
824 | "sector size (%i). This is not supported. " | |
825 | "Sorry.", vol->mft_record_size, | |
826 | vol->sector_size); | |
c49c3111 | 827 | return false; |
1da177e4 LT |
828 | } |
829 | clusters_per_index_record = b->clusters_per_index_record; | |
830 | ntfs_debug("clusters_per_index_record = %i (0x%x)", | |
831 | clusters_per_index_record, clusters_per_index_record); | |
832 | if (clusters_per_index_record > 0) | |
833 | vol->index_record_size = vol->cluster_size << | |
834 | (ffs(clusters_per_index_record) - 1); | |
835 | else | |
836 | /* | |
837 | * When index_record_size < cluster_size, | |
838 | * clusters_per_index_record = -log2(index_record_size) bytes. | |
839 | * index_record_size normaly equals 4096 bytes, which is | |
840 | * encoded as 0xF4 (-12 in decimal). | |
841 | */ | |
842 | vol->index_record_size = 1 << -clusters_per_index_record; | |
843 | vol->index_record_size_mask = vol->index_record_size - 1; | |
844 | vol->index_record_size_bits = ffs(vol->index_record_size) - 1; | |
845 | ntfs_debug("vol->index_record_size = %i (0x%x)", | |
846 | vol->index_record_size, vol->index_record_size); | |
847 | ntfs_debug("vol->index_record_size_mask = 0x%x", | |
848 | vol->index_record_size_mask); | |
849 | ntfs_debug("vol->index_record_size_bits = %i (0x%x)", | |
850 | vol->index_record_size_bits, | |
851 | vol->index_record_size_bits); | |
78af34f0 AA |
852 | /* We cannot support index record sizes below the sector size. */ |
853 | if (vol->index_record_size < vol->sector_size) { | |
854 | ntfs_error(vol->sb, "Index record size (%i) is smaller than " | |
855 | "the sector size (%i). This is not " | |
856 | "supported. Sorry.", vol->index_record_size, | |
857 | vol->sector_size); | |
c49c3111 | 858 | return false; |
78af34f0 | 859 | } |
1da177e4 LT |
860 | /* |
861 | * Get the size of the volume in clusters and check for 64-bit-ness. | |
862 | * Windows currently only uses 32 bits to save the clusters so we do | |
863 | * the same as it is much faster on 32-bit CPUs. | |
864 | */ | |
865 | ll = sle64_to_cpu(b->number_of_sectors) >> sectors_per_cluster_bits; | |
866 | if ((u64)ll >= 1ULL << 32) { | |
867 | ntfs_error(vol->sb, "Cannot handle 64-bit clusters. Sorry."); | |
c49c3111 | 868 | return false; |
1da177e4 LT |
869 | } |
870 | vol->nr_clusters = ll; | |
871 | ntfs_debug("vol->nr_clusters = 0x%llx", (long long)vol->nr_clusters); | |
872 | /* | |
873 | * On an architecture where unsigned long is 32-bits, we restrict the | |
874 | * volume size to 2TiB (2^41). On a 64-bit architecture, the compiler | |
875 | * will hopefully optimize the whole check away. | |
876 | */ | |
877 | if (sizeof(unsigned long) < 8) { | |
878 | if ((ll << vol->cluster_size_bits) >= (1ULL << 41)) { | |
879 | ntfs_error(vol->sb, "Volume size (%lluTiB) is too " | |
880 | "large for this architecture. " | |
881 | "Maximum supported is 2TiB. Sorry.", | |
882 | (unsigned long long)ll >> (40 - | |
883 | vol->cluster_size_bits)); | |
c49c3111 | 884 | return false; |
1da177e4 LT |
885 | } |
886 | } | |
887 | ll = sle64_to_cpu(b->mft_lcn); | |
888 | if (ll >= vol->nr_clusters) { | |
78af34f0 AA |
889 | ntfs_error(vol->sb, "MFT LCN (%lli, 0x%llx) is beyond end of " |
890 | "volume. Weird.", (unsigned long long)ll, | |
891 | (unsigned long long)ll); | |
c49c3111 | 892 | return false; |
1da177e4 LT |
893 | } |
894 | vol->mft_lcn = ll; | |
895 | ntfs_debug("vol->mft_lcn = 0x%llx", (long long)vol->mft_lcn); | |
896 | ll = sle64_to_cpu(b->mftmirr_lcn); | |
897 | if (ll >= vol->nr_clusters) { | |
78af34f0 AA |
898 | ntfs_error(vol->sb, "MFTMirr LCN (%lli, 0x%llx) is beyond end " |
899 | "of volume. Weird.", (unsigned long long)ll, | |
900 | (unsigned long long)ll); | |
c49c3111 | 901 | return false; |
1da177e4 LT |
902 | } |
903 | vol->mftmirr_lcn = ll; | |
904 | ntfs_debug("vol->mftmirr_lcn = 0x%llx", (long long)vol->mftmirr_lcn); | |
905 | #ifdef NTFS_RW | |
906 | /* | |
907 | * Work out the size of the mft mirror in number of mft records. If the | |
908 | * cluster size is less than or equal to the size taken by four mft | |
909 | * records, the mft mirror stores the first four mft records. If the | |
910 | * cluster size is bigger than the size taken by four mft records, the | |
911 | * mft mirror contains as many mft records as will fit into one | |
912 | * cluster. | |
913 | */ | |
914 | if (vol->cluster_size <= (4 << vol->mft_record_size_bits)) | |
915 | vol->mftmirr_size = 4; | |
916 | else | |
917 | vol->mftmirr_size = vol->cluster_size >> | |
918 | vol->mft_record_size_bits; | |
919 | ntfs_debug("vol->mftmirr_size = %i", vol->mftmirr_size); | |
920 | #endif /* NTFS_RW */ | |
921 | vol->serial_no = le64_to_cpu(b->volume_serial_number); | |
922 | ntfs_debug("vol->serial_no = 0x%llx", | |
923 | (unsigned long long)vol->serial_no); | |
c49c3111 | 924 | return true; |
1da177e4 LT |
925 | } |
926 | ||
927 | /** | |
928 | * ntfs_setup_allocators - initialize the cluster and mft allocators | |
929 | * @vol: volume structure for which to setup the allocators | |
930 | * | |
931 | * Setup the cluster (lcn) and mft allocators to the starting values. | |
932 | */ | |
933 | static void ntfs_setup_allocators(ntfs_volume *vol) | |
934 | { | |
935 | #ifdef NTFS_RW | |
936 | LCN mft_zone_size, mft_lcn; | |
937 | #endif /* NTFS_RW */ | |
938 | ||
939 | ntfs_debug("vol->mft_zone_multiplier = 0x%x", | |
940 | vol->mft_zone_multiplier); | |
941 | #ifdef NTFS_RW | |
942 | /* Determine the size of the MFT zone. */ | |
943 | mft_zone_size = vol->nr_clusters; | |
944 | switch (vol->mft_zone_multiplier) { /* % of volume size in clusters */ | |
945 | case 4: | |
946 | mft_zone_size >>= 1; /* 50% */ | |
947 | break; | |
948 | case 3: | |
949 | mft_zone_size = (mft_zone_size + | |
950 | (mft_zone_size >> 1)) >> 2; /* 37.5% */ | |
951 | break; | |
952 | case 2: | |
953 | mft_zone_size >>= 2; /* 25% */ | |
954 | break; | |
955 | /* case 1: */ | |
956 | default: | |
957 | mft_zone_size >>= 3; /* 12.5% */ | |
958 | break; | |
959 | } | |
960 | /* Setup the mft zone. */ | |
961 | vol->mft_zone_start = vol->mft_zone_pos = vol->mft_lcn; | |
962 | ntfs_debug("vol->mft_zone_pos = 0x%llx", | |
963 | (unsigned long long)vol->mft_zone_pos); | |
964 | /* | |
965 | * Calculate the mft_lcn for an unmodified NTFS volume (see mkntfs | |
966 | * source) and if the actual mft_lcn is in the expected place or even | |
967 | * further to the front of the volume, extend the mft_zone to cover the | |
968 | * beginning of the volume as well. This is in order to protect the | |
969 | * area reserved for the mft bitmap as well within the mft_zone itself. | |
970 | * On non-standard volumes we do not protect it as the overhead would | |
971 | * be higher than the speed increase we would get by doing it. | |
972 | */ | |
973 | mft_lcn = (8192 + 2 * vol->cluster_size - 1) / vol->cluster_size; | |
974 | if (mft_lcn * vol->cluster_size < 16 * 1024) | |
975 | mft_lcn = (16 * 1024 + vol->cluster_size - 1) / | |
976 | vol->cluster_size; | |
977 | if (vol->mft_zone_start <= mft_lcn) | |
978 | vol->mft_zone_start = 0; | |
979 | ntfs_debug("vol->mft_zone_start = 0x%llx", | |
980 | (unsigned long long)vol->mft_zone_start); | |
981 | /* | |
982 | * Need to cap the mft zone on non-standard volumes so that it does | |
983 | * not point outside the boundaries of the volume. We do this by | |
984 | * halving the zone size until we are inside the volume. | |
985 | */ | |
986 | vol->mft_zone_end = vol->mft_lcn + mft_zone_size; | |
987 | while (vol->mft_zone_end >= vol->nr_clusters) { | |
988 | mft_zone_size >>= 1; | |
989 | vol->mft_zone_end = vol->mft_lcn + mft_zone_size; | |
990 | } | |
991 | ntfs_debug("vol->mft_zone_end = 0x%llx", | |
992 | (unsigned long long)vol->mft_zone_end); | |
993 | /* | |
994 | * Set the current position within each data zone to the start of the | |
995 | * respective zone. | |
996 | */ | |
997 | vol->data1_zone_pos = vol->mft_zone_end; | |
998 | ntfs_debug("vol->data1_zone_pos = 0x%llx", | |
999 | (unsigned long long)vol->data1_zone_pos); | |
1000 | vol->data2_zone_pos = 0; | |
1001 | ntfs_debug("vol->data2_zone_pos = 0x%llx", | |
1002 | (unsigned long long)vol->data2_zone_pos); | |
1003 | ||
1004 | /* Set the mft data allocation position to mft record 24. */ | |
1005 | vol->mft_data_pos = 24; | |
1006 | ntfs_debug("vol->mft_data_pos = 0x%llx", | |
1007 | (unsigned long long)vol->mft_data_pos); | |
1008 | #endif /* NTFS_RW */ | |
1009 | } | |
1010 | ||
1011 | #ifdef NTFS_RW | |
1012 | ||
1013 | /** | |
1014 | * load_and_init_mft_mirror - load and setup the mft mirror inode for a volume | |
1015 | * @vol: ntfs super block describing device whose mft mirror to load | |
1016 | * | |
c49c3111 | 1017 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1018 | */ |
c49c3111 | 1019 | static bool load_and_init_mft_mirror(ntfs_volume *vol) |
1da177e4 LT |
1020 | { |
1021 | struct inode *tmp_ino; | |
1022 | ntfs_inode *tmp_ni; | |
1023 | ||
1024 | ntfs_debug("Entering."); | |
1025 | /* Get mft mirror inode. */ | |
1026 | tmp_ino = ntfs_iget(vol->sb, FILE_MFTMirr); | |
1027 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { | |
1028 | if (!IS_ERR(tmp_ino)) | |
1029 | iput(tmp_ino); | |
1030 | /* Caller will display error message. */ | |
c49c3111 | 1031 | return false; |
1da177e4 LT |
1032 | } |
1033 | /* | |
1034 | * Re-initialize some specifics about $MFTMirr's inode as | |
1035 | * ntfs_read_inode() will have set up the default ones. | |
1036 | */ | |
1037 | /* Set uid and gid to root. */ | |
1038 | tmp_ino->i_uid = tmp_ino->i_gid = 0; | |
1039 | /* Regular file. No access for anyone. */ | |
1040 | tmp_ino->i_mode = S_IFREG; | |
1041 | /* No VFS initiated operations allowed for $MFTMirr. */ | |
1042 | tmp_ino->i_op = &ntfs_empty_inode_ops; | |
1043 | tmp_ino->i_fop = &ntfs_empty_file_ops; | |
1044 | /* Put in our special address space operations. */ | |
1045 | tmp_ino->i_mapping->a_ops = &ntfs_mst_aops; | |
1046 | tmp_ni = NTFS_I(tmp_ino); | |
1047 | /* The $MFTMirr, like the $MFT is multi sector transfer protected. */ | |
1048 | NInoSetMstProtected(tmp_ni); | |
c002f425 | 1049 | NInoSetSparseDisabled(tmp_ni); |
1da177e4 LT |
1050 | /* |
1051 | * Set up our little cheat allowing us to reuse the async read io | |
1052 | * completion handler for directories. | |
1053 | */ | |
1054 | tmp_ni->itype.index.block_size = vol->mft_record_size; | |
1055 | tmp_ni->itype.index.block_size_bits = vol->mft_record_size_bits; | |
1056 | vol->mftmirr_ino = tmp_ino; | |
1057 | ntfs_debug("Done."); | |
c49c3111 | 1058 | return true; |
1da177e4 LT |
1059 | } |
1060 | ||
1061 | /** | |
1062 | * check_mft_mirror - compare contents of the mft mirror with the mft | |
1063 | * @vol: ntfs super block describing device whose mft mirror to check | |
1064 | * | |
c49c3111 | 1065 | * Return 'true' on success or 'false' on error. |
1da177e4 LT |
1066 | * |
1067 | * Note, this function also results in the mft mirror runlist being completely | |
1068 | * mapped into memory. The mft mirror write code requires this and will BUG() | |
1069 | * should it find an unmapped runlist element. | |
1070 | */ | |
c49c3111 | 1071 | static bool check_mft_mirror(ntfs_volume *vol) |
1da177e4 | 1072 | { |
1da177e4 LT |
1073 | struct super_block *sb = vol->sb; |
1074 | ntfs_inode *mirr_ni; | |
1075 | struct page *mft_page, *mirr_page; | |
1076 | u8 *kmft, *kmirr; | |
1077 | runlist_element *rl, rl2[2]; | |
218357ff | 1078 | pgoff_t index; |
1da177e4 LT |
1079 | int mrecs_per_page, i; |
1080 | ||
1081 | ntfs_debug("Entering."); | |
1082 | /* Compare contents of $MFT and $MFTMirr. */ | |
1083 | mrecs_per_page = PAGE_CACHE_SIZE / vol->mft_record_size; | |
1084 | BUG_ON(!mrecs_per_page); | |
1085 | BUG_ON(!vol->mftmirr_size); | |
1086 | mft_page = mirr_page = NULL; | |
1087 | kmft = kmirr = NULL; | |
1088 | index = i = 0; | |
1089 | do { | |
1090 | u32 bytes; | |
1091 | ||
1092 | /* Switch pages if necessary. */ | |
1093 | if (!(i % mrecs_per_page)) { | |
1094 | if (index) { | |
1095 | ntfs_unmap_page(mft_page); | |
1096 | ntfs_unmap_page(mirr_page); | |
1097 | } | |
1098 | /* Get the $MFT page. */ | |
1099 | mft_page = ntfs_map_page(vol->mft_ino->i_mapping, | |
1100 | index); | |
1101 | if (IS_ERR(mft_page)) { | |
1102 | ntfs_error(sb, "Failed to read $MFT."); | |
c49c3111 | 1103 | return false; |
1da177e4 LT |
1104 | } |
1105 | kmft = page_address(mft_page); | |
1106 | /* Get the $MFTMirr page. */ | |
1107 | mirr_page = ntfs_map_page(vol->mftmirr_ino->i_mapping, | |
1108 | index); | |
1109 | if (IS_ERR(mirr_page)) { | |
1110 | ntfs_error(sb, "Failed to read $MFTMirr."); | |
1111 | goto mft_unmap_out; | |
1112 | } | |
1113 | kmirr = page_address(mirr_page); | |
1114 | ++index; | |
1115 | } | |
949763b2 AA |
1116 | /* Do not check the record if it is not in use. */ |
1117 | if (((MFT_RECORD*)kmft)->flags & MFT_RECORD_IN_USE) { | |
1118 | /* Make sure the record is ok. */ | |
1119 | if (ntfs_is_baad_recordp((le32*)kmft)) { | |
1120 | ntfs_error(sb, "Incomplete multi sector " | |
1121 | "transfer detected in mft " | |
1122 | "record %i.", i); | |
1da177e4 | 1123 | mm_unmap_out: |
949763b2 | 1124 | ntfs_unmap_page(mirr_page); |
1da177e4 | 1125 | mft_unmap_out: |
949763b2 | 1126 | ntfs_unmap_page(mft_page); |
c49c3111 | 1127 | return false; |
949763b2 | 1128 | } |
1da177e4 | 1129 | } |
949763b2 AA |
1130 | /* Do not check the mirror record if it is not in use. */ |
1131 | if (((MFT_RECORD*)kmirr)->flags & MFT_RECORD_IN_USE) { | |
1132 | if (ntfs_is_baad_recordp((le32*)kmirr)) { | |
1133 | ntfs_error(sb, "Incomplete multi sector " | |
1134 | "transfer detected in mft " | |
1135 | "mirror record %i.", i); | |
1136 | goto mm_unmap_out; | |
1137 | } | |
1da177e4 LT |
1138 | } |
1139 | /* Get the amount of data in the current record. */ | |
1140 | bytes = le32_to_cpu(((MFT_RECORD*)kmft)->bytes_in_use); | |
949763b2 AA |
1141 | if (bytes < sizeof(MFT_RECORD_OLD) || |
1142 | bytes > vol->mft_record_size || | |
1143 | ntfs_is_baad_recordp((le32*)kmft)) { | |
1da177e4 | 1144 | bytes = le32_to_cpu(((MFT_RECORD*)kmirr)->bytes_in_use); |
949763b2 AA |
1145 | if (bytes < sizeof(MFT_RECORD_OLD) || |
1146 | bytes > vol->mft_record_size || | |
1147 | ntfs_is_baad_recordp((le32*)kmirr)) | |
1da177e4 LT |
1148 | bytes = vol->mft_record_size; |
1149 | } | |
1150 | /* Compare the two records. */ | |
1151 | if (memcmp(kmft, kmirr, bytes)) { | |
1152 | ntfs_error(sb, "$MFT and $MFTMirr (record %i) do not " | |
1153 | "match. Run ntfsfix or chkdsk.", i); | |
1154 | goto mm_unmap_out; | |
1155 | } | |
1156 | kmft += vol->mft_record_size; | |
1157 | kmirr += vol->mft_record_size; | |
1158 | } while (++i < vol->mftmirr_size); | |
1159 | /* Release the last pages. */ | |
1160 | ntfs_unmap_page(mft_page); | |
1161 | ntfs_unmap_page(mirr_page); | |
1162 | ||
1163 | /* Construct the mft mirror runlist by hand. */ | |
1164 | rl2[0].vcn = 0; | |
1165 | rl2[0].lcn = vol->mftmirr_lcn; | |
1166 | rl2[0].length = (vol->mftmirr_size * vol->mft_record_size + | |
1167 | vol->cluster_size - 1) / vol->cluster_size; | |
1168 | rl2[1].vcn = rl2[0].length; | |
1169 | rl2[1].lcn = LCN_ENOENT; | |
1170 | rl2[1].length = 0; | |
1171 | /* | |
1172 | * Because we have just read all of the mft mirror, we know we have | |
1173 | * mapped the full runlist for it. | |
1174 | */ | |
1175 | mirr_ni = NTFS_I(vol->mftmirr_ino); | |
1176 | down_read(&mirr_ni->runlist.lock); | |
1177 | rl = mirr_ni->runlist.rl; | |
1178 | /* Compare the two runlists. They must be identical. */ | |
1179 | i = 0; | |
1180 | do { | |
1181 | if (rl2[i].vcn != rl[i].vcn || rl2[i].lcn != rl[i].lcn || | |
1182 | rl2[i].length != rl[i].length) { | |
1183 | ntfs_error(sb, "$MFTMirr location mismatch. " | |
1184 | "Run chkdsk."); | |
1185 | up_read(&mirr_ni->runlist.lock); | |
c49c3111 | 1186 | return false; |
1da177e4 LT |
1187 | } |
1188 | } while (rl2[i++].length); | |
1189 | up_read(&mirr_ni->runlist.lock); | |
1190 | ntfs_debug("Done."); | |
c49c3111 | 1191 | return true; |
1da177e4 LT |
1192 | } |
1193 | ||
1194 | /** | |
1195 | * load_and_check_logfile - load and check the logfile inode for a volume | |
1196 | * @vol: ntfs super block describing device whose logfile to load | |
1197 | * | |
c49c3111 | 1198 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1199 | */ |
c49c3111 | 1200 | static bool load_and_check_logfile(ntfs_volume *vol, |
e7a1033b | 1201 | RESTART_PAGE_HEADER **rp) |
1da177e4 LT |
1202 | { |
1203 | struct inode *tmp_ino; | |
1204 | ||
1205 | ntfs_debug("Entering."); | |
1206 | tmp_ino = ntfs_iget(vol->sb, FILE_LogFile); | |
1207 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { | |
1208 | if (!IS_ERR(tmp_ino)) | |
1209 | iput(tmp_ino); | |
1210 | /* Caller will display error message. */ | |
c49c3111 | 1211 | return false; |
1da177e4 | 1212 | } |
e7a1033b | 1213 | if (!ntfs_check_logfile(tmp_ino, rp)) { |
1da177e4 LT |
1214 | iput(tmp_ino); |
1215 | /* ntfs_check_logfile() will have displayed error output. */ | |
c49c3111 | 1216 | return false; |
1da177e4 | 1217 | } |
c002f425 | 1218 | NInoSetSparseDisabled(NTFS_I(tmp_ino)); |
1da177e4 LT |
1219 | vol->logfile_ino = tmp_ino; |
1220 | ntfs_debug("Done."); | |
c49c3111 | 1221 | return true; |
1da177e4 LT |
1222 | } |
1223 | ||
ca8fd7a0 AA |
1224 | #define NTFS_HIBERFIL_HEADER_SIZE 4096 |
1225 | ||
1226 | /** | |
1227 | * check_windows_hibernation_status - check if Windows is suspended on a volume | |
1228 | * @vol: ntfs super block of device to check | |
1229 | * | |
1230 | * Check if Windows is hibernated on the ntfs volume @vol. This is done by | |
1231 | * looking for the file hiberfil.sys in the root directory of the volume. If | |
1232 | * the file is not present Windows is definitely not suspended. | |
1233 | * | |
1234 | * If hiberfil.sys exists and is less than 4kiB in size it means Windows is | |
1235 | * definitely suspended (this volume is not the system volume). Caveat: on a | |
1236 | * system with many volumes it is possible that the < 4kiB check is bogus but | |
1237 | * for now this should do fine. | |
1238 | * | |
1239 | * If hiberfil.sys exists and is larger than 4kiB in size, we need to read the | |
1240 | * hiberfil header (which is the first 4kiB). If this begins with "hibr", | |
1241 | * Windows is definitely suspended. If it is completely full of zeroes, | |
1242 | * Windows is definitely not hibernated. Any other case is treated as if | |
1243 | * Windows is suspended. This caters for the above mentioned caveat of a | |
1244 | * system with many volumes where no "hibr" magic would be present and there is | |
1245 | * no zero header. | |
1246 | * | |
1247 | * Return 0 if Windows is not hibernated on the volume, >0 if Windows is | |
1248 | * hibernated on the volume, and -errno on error. | |
1249 | */ | |
1250 | static int check_windows_hibernation_status(ntfs_volume *vol) | |
1251 | { | |
1252 | MFT_REF mref; | |
1253 | struct inode *vi; | |
1254 | ntfs_inode *ni; | |
1255 | struct page *page; | |
1256 | u32 *kaddr, *kend; | |
1257 | ntfs_name *name = NULL; | |
1258 | int ret = 1; | |
63cd8854 HH |
1259 | static const ntfschar hiberfil[13] = { cpu_to_le16('h'), |
1260 | cpu_to_le16('i'), cpu_to_le16('b'), | |
1261 | cpu_to_le16('e'), cpu_to_le16('r'), | |
1262 | cpu_to_le16('f'), cpu_to_le16('i'), | |
1263 | cpu_to_le16('l'), cpu_to_le16('.'), | |
1264 | cpu_to_le16('s'), cpu_to_le16('y'), | |
1265 | cpu_to_le16('s'), 0 }; | |
ca8fd7a0 AA |
1266 | |
1267 | ntfs_debug("Entering."); | |
1268 | /* | |
1269 | * Find the inode number for the hibernation file by looking up the | |
1270 | * filename hiberfil.sys in the root directory. | |
1271 | */ | |
1b1dcc1b | 1272 | mutex_lock(&vol->root_ino->i_mutex); |
ca8fd7a0 AA |
1273 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->root_ino), hiberfil, 12, |
1274 | &name); | |
1b1dcc1b | 1275 | mutex_unlock(&vol->root_ino->i_mutex); |
ca8fd7a0 AA |
1276 | if (IS_ERR_MREF(mref)) { |
1277 | ret = MREF_ERR(mref); | |
1278 | /* If the file does not exist, Windows is not hibernated. */ | |
1279 | if (ret == -ENOENT) { | |
1280 | ntfs_debug("hiberfil.sys not present. Windows is not " | |
1281 | "hibernated on the volume."); | |
1282 | return 0; | |
1283 | } | |
1284 | /* A real error occured. */ | |
1285 | ntfs_error(vol->sb, "Failed to find inode number for " | |
1286 | "hiberfil.sys."); | |
1287 | return ret; | |
1288 | } | |
1289 | /* We do not care for the type of match that was found. */ | |
1290 | kfree(name); | |
1291 | /* Get the inode. */ | |
1292 | vi = ntfs_iget(vol->sb, MREF(mref)); | |
1293 | if (IS_ERR(vi) || is_bad_inode(vi)) { | |
1294 | if (!IS_ERR(vi)) | |
1295 | iput(vi); | |
1296 | ntfs_error(vol->sb, "Failed to load hiberfil.sys."); | |
1297 | return IS_ERR(vi) ? PTR_ERR(vi) : -EIO; | |
1298 | } | |
1299 | if (unlikely(i_size_read(vi) < NTFS_HIBERFIL_HEADER_SIZE)) { | |
1300 | ntfs_debug("hiberfil.sys is smaller than 4kiB (0x%llx). " | |
1301 | "Windows is hibernated on the volume. This " | |
1302 | "is not the system volume.", i_size_read(vi)); | |
1303 | goto iput_out; | |
1304 | } | |
1305 | ni = NTFS_I(vi); | |
1306 | page = ntfs_map_page(vi->i_mapping, 0); | |
1307 | if (IS_ERR(page)) { | |
1308 | ntfs_error(vol->sb, "Failed to read from hiberfil.sys."); | |
1309 | ret = PTR_ERR(page); | |
1310 | goto iput_out; | |
1311 | } | |
1312 | kaddr = (u32*)page_address(page); | |
63cd8854 | 1313 | if (*(le32*)kaddr == cpu_to_le32(0x72626968)/*'hibr'*/) { |
ca8fd7a0 AA |
1314 | ntfs_debug("Magic \"hibr\" found in hiberfil.sys. Windows is " |
1315 | "hibernated on the volume. This is the " | |
1316 | "system volume."); | |
1317 | goto unm_iput_out; | |
1318 | } | |
1319 | kend = kaddr + NTFS_HIBERFIL_HEADER_SIZE/sizeof(*kaddr); | |
1320 | do { | |
1321 | if (unlikely(*kaddr)) { | |
1322 | ntfs_debug("hiberfil.sys is larger than 4kiB " | |
1323 | "(0x%llx), does not contain the " | |
1324 | "\"hibr\" magic, and does not have a " | |
1325 | "zero header. Windows is hibernated " | |
1326 | "on the volume. This is not the " | |
1327 | "system volume.", i_size_read(vi)); | |
1328 | goto unm_iput_out; | |
1329 | } | |
1330 | } while (++kaddr < kend); | |
1331 | ntfs_debug("hiberfil.sys contains a zero header. Windows is not " | |
1332 | "hibernated on the volume. This is the system " | |
1333 | "volume."); | |
1334 | ret = 0; | |
1335 | unm_iput_out: | |
1336 | ntfs_unmap_page(page); | |
1337 | iput_out: | |
1338 | iput(vi); | |
1339 | return ret; | |
1340 | } | |
1341 | ||
1da177e4 LT |
1342 | /** |
1343 | * load_and_init_quota - load and setup the quota file for a volume if present | |
1344 | * @vol: ntfs super block describing device whose quota file to load | |
1345 | * | |
c49c3111 | 1346 | * Return 'true' on success or 'false' on error. If $Quota is not present, we |
1da177e4 LT |
1347 | * leave vol->quota_ino as NULL and return success. |
1348 | */ | |
c49c3111 | 1349 | static bool load_and_init_quota(ntfs_volume *vol) |
1da177e4 LT |
1350 | { |
1351 | MFT_REF mref; | |
1352 | struct inode *tmp_ino; | |
1353 | ntfs_name *name = NULL; | |
63cd8854 HH |
1354 | static const ntfschar Quota[7] = { cpu_to_le16('$'), |
1355 | cpu_to_le16('Q'), cpu_to_le16('u'), | |
1356 | cpu_to_le16('o'), cpu_to_le16('t'), | |
1357 | cpu_to_le16('a'), 0 }; | |
1358 | static ntfschar Q[3] = { cpu_to_le16('$'), | |
1359 | cpu_to_le16('Q'), 0 }; | |
1da177e4 LT |
1360 | |
1361 | ntfs_debug("Entering."); | |
1362 | /* | |
1363 | * Find the inode number for the quota file by looking up the filename | |
1364 | * $Quota in the extended system files directory $Extend. | |
1365 | */ | |
1b1dcc1b | 1366 | mutex_lock(&vol->extend_ino->i_mutex); |
1da177e4 LT |
1367 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), Quota, 6, |
1368 | &name); | |
1b1dcc1b | 1369 | mutex_unlock(&vol->extend_ino->i_mutex); |
1da177e4 LT |
1370 | if (IS_ERR_MREF(mref)) { |
1371 | /* | |
1372 | * If the file does not exist, quotas are disabled and have | |
1373 | * never been enabled on this volume, just return success. | |
1374 | */ | |
1375 | if (MREF_ERR(mref) == -ENOENT) { | |
1376 | ntfs_debug("$Quota not present. Volume does not have " | |
1377 | "quotas enabled."); | |
1378 | /* | |
1379 | * No need to try to set quotas out of date if they are | |
1380 | * not enabled. | |
1381 | */ | |
1382 | NVolSetQuotaOutOfDate(vol); | |
c49c3111 | 1383 | return true; |
1da177e4 LT |
1384 | } |
1385 | /* A real error occured. */ | |
1386 | ntfs_error(vol->sb, "Failed to find inode number for $Quota."); | |
c49c3111 | 1387 | return false; |
1da177e4 LT |
1388 | } |
1389 | /* We do not care for the type of match that was found. */ | |
251c8427 | 1390 | kfree(name); |
1da177e4 LT |
1391 | /* Get the inode. */ |
1392 | tmp_ino = ntfs_iget(vol->sb, MREF(mref)); | |
1393 | if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) { | |
1394 | if (!IS_ERR(tmp_ino)) | |
1395 | iput(tmp_ino); | |
1396 | ntfs_error(vol->sb, "Failed to load $Quota."); | |
c49c3111 | 1397 | return false; |
1da177e4 LT |
1398 | } |
1399 | vol->quota_ino = tmp_ino; | |
1400 | /* Get the $Q index allocation attribute. */ | |
1401 | tmp_ino = ntfs_index_iget(vol->quota_ino, Q, 2); | |
1402 | if (IS_ERR(tmp_ino)) { | |
1403 | ntfs_error(vol->sb, "Failed to load $Quota/$Q index."); | |
c49c3111 | 1404 | return false; |
1da177e4 LT |
1405 | } |
1406 | vol->quota_q_ino = tmp_ino; | |
1407 | ntfs_debug("Done."); | |
c49c3111 | 1408 | return true; |
1da177e4 LT |
1409 | } |
1410 | ||
3f2faef0 AA |
1411 | /** |
1412 | * load_and_init_usnjrnl - load and setup the transaction log if present | |
1413 | * @vol: ntfs super block describing device whose usnjrnl file to load | |
1414 | * | |
c49c3111 | 1415 | * Return 'true' on success or 'false' on error. |
3f2faef0 AA |
1416 | * |
1417 | * If $UsnJrnl is not present or in the process of being disabled, we set | |
1418 | * NVolUsnJrnlStamped() and return success. | |
1419 | * | |
1420 | * If the $UsnJrnl $DATA/$J attribute has a size equal to the lowest valid usn, | |
1421 | * i.e. transaction logging has only just been enabled or the journal has been | |
1422 | * stamped and nothing has been logged since, we also set NVolUsnJrnlStamped() | |
1423 | * and return success. | |
1424 | */ | |
c49c3111 | 1425 | static bool load_and_init_usnjrnl(ntfs_volume *vol) |
3f2faef0 AA |
1426 | { |
1427 | MFT_REF mref; | |
1428 | struct inode *tmp_ino; | |
1429 | ntfs_inode *tmp_ni; | |
1430 | struct page *page; | |
1431 | ntfs_name *name = NULL; | |
1432 | USN_HEADER *uh; | |
63cd8854 HH |
1433 | static const ntfschar UsnJrnl[9] = { cpu_to_le16('$'), |
1434 | cpu_to_le16('U'), cpu_to_le16('s'), | |
1435 | cpu_to_le16('n'), cpu_to_le16('J'), | |
1436 | cpu_to_le16('r'), cpu_to_le16('n'), | |
1437 | cpu_to_le16('l'), 0 }; | |
1438 | static ntfschar Max[5] = { cpu_to_le16('$'), | |
1439 | cpu_to_le16('M'), cpu_to_le16('a'), | |
1440 | cpu_to_le16('x'), 0 }; | |
1441 | static ntfschar J[3] = { cpu_to_le16('$'), | |
1442 | cpu_to_le16('J'), 0 }; | |
3f2faef0 AA |
1443 | |
1444 | ntfs_debug("Entering."); | |
1445 | /* | |
1446 | * Find the inode number for the transaction log file by looking up the | |
1447 | * filename $UsnJrnl in the extended system files directory $Extend. | |
1448 | */ | |
1b1dcc1b | 1449 | mutex_lock(&vol->extend_ino->i_mutex); |
3f2faef0 AA |
1450 | mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), UsnJrnl, 8, |
1451 | &name); | |
1b1dcc1b | 1452 | mutex_unlock(&vol->extend_ino->i_mutex); |
3f2faef0 AA |
1453 | if (IS_ERR_MREF(mref)) { |
1454 | /* | |
1455 | * If the file does not exist, transaction logging is disabled, | |
1456 | * just return success. | |
1457 | */ | |
1458 | if (MREF_ERR(mref) == -ENOENT) { | |
1459 | ntfs_debug("$UsnJrnl not present. Volume does not " | |
1460 | "have transaction logging enabled."); | |
1461 | not_enabled: | |
1462 | /* | |
1463 | * No need to try to stamp the transaction log if | |
1464 | * transaction logging is not enabled. | |
1465 | */ | |
1466 | NVolSetUsnJrnlStamped(vol); | |
c49c3111 | 1467 | return true; |
3f2faef0 AA |
1468 | } |
1469 | /* A real error occured. */ | |
1470 | ntfs_error(vol->sb, "Failed to find inode number for " | |
1471 | "$UsnJrnl."); | |
c49c3111 | 1472 | return false; |
3f2faef0 AA |
1473 | } |
1474 | /* We do not care for the type of match that was found. */ | |
1475 | kfree(name); | |
1476 | /* Get the inode. */ | |
1477 | tmp_ino = ntfs_iget(vol->sb, MREF(mref)); | |
1478 | if (unlikely(IS_ERR(tmp_ino) || is_bad_inode(tmp_ino))) { | |
1479 | if (!IS_ERR(tmp_ino)) | |
1480 | iput(tmp_ino); | |
1481 | ntfs_error(vol->sb, "Failed to load $UsnJrnl."); | |
c49c3111 | 1482 | return false; |
3f2faef0 AA |
1483 | } |
1484 | vol->usnjrnl_ino = tmp_ino; | |
1485 | /* | |
1486 | * If the transaction log is in the process of being deleted, we can | |
1487 | * ignore it. | |
1488 | */ | |
1489 | if (unlikely(vol->vol_flags & VOLUME_DELETE_USN_UNDERWAY)) { | |
1490 | ntfs_debug("$UsnJrnl in the process of being disabled. " | |
1491 | "Volume does not have transaction logging " | |
1492 | "enabled."); | |
1493 | goto not_enabled; | |
1494 | } | |
1495 | /* Get the $DATA/$Max attribute. */ | |
1496 | tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, Max, 4); | |
1497 | if (IS_ERR(tmp_ino)) { | |
1498 | ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$Max " | |
1499 | "attribute."); | |
c49c3111 | 1500 | return false; |
3f2faef0 AA |
1501 | } |
1502 | vol->usnjrnl_max_ino = tmp_ino; | |
1503 | if (unlikely(i_size_read(tmp_ino) < sizeof(USN_HEADER))) { | |
1504 | ntfs_error(vol->sb, "Found corrupt $UsnJrnl/$DATA/$Max " | |
1505 | "attribute (size is 0x%llx but should be at " | |
d04bd1fb | 1506 | "least 0x%zx bytes).", i_size_read(tmp_ino), |
3f2faef0 | 1507 | sizeof(USN_HEADER)); |
c49c3111 | 1508 | return false; |
3f2faef0 AA |
1509 | } |
1510 | /* Get the $DATA/$J attribute. */ | |
1511 | tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, J, 2); | |
1512 | if (IS_ERR(tmp_ino)) { | |
1513 | ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$J " | |
1514 | "attribute."); | |
c49c3111 | 1515 | return false; |
3f2faef0 AA |
1516 | } |
1517 | vol->usnjrnl_j_ino = tmp_ino; | |
1518 | /* Verify $J is non-resident and sparse. */ | |
1519 | tmp_ni = NTFS_I(vol->usnjrnl_j_ino); | |
1520 | if (unlikely(!NInoNonResident(tmp_ni) || !NInoSparse(tmp_ni))) { | |
1521 | ntfs_error(vol->sb, "$UsnJrnl/$DATA/$J attribute is resident " | |
1522 | "and/or not sparse."); | |
c49c3111 | 1523 | return false; |
3f2faef0 AA |
1524 | } |
1525 | /* Read the USN_HEADER from $DATA/$Max. */ | |
1526 | page = ntfs_map_page(vol->usnjrnl_max_ino->i_mapping, 0); | |
1527 | if (IS_ERR(page)) { | |
1528 | ntfs_error(vol->sb, "Failed to read from $UsnJrnl/$DATA/$Max " | |
1529 | "attribute."); | |
c49c3111 | 1530 | return false; |
3f2faef0 AA |
1531 | } |
1532 | uh = (USN_HEADER*)page_address(page); | |
1533 | /* Sanity check the $Max. */ | |
1534 | if (unlikely(sle64_to_cpu(uh->allocation_delta) > | |
1535 | sle64_to_cpu(uh->maximum_size))) { | |
1536 | ntfs_error(vol->sb, "Allocation delta (0x%llx) exceeds " | |
1537 | "maximum size (0x%llx). $UsnJrnl is corrupt.", | |
1538 | (long long)sle64_to_cpu(uh->allocation_delta), | |
1539 | (long long)sle64_to_cpu(uh->maximum_size)); | |
1540 | ntfs_unmap_page(page); | |
c49c3111 | 1541 | return false; |
3f2faef0 AA |
1542 | } |
1543 | /* | |
1544 | * If the transaction log has been stamped and nothing has been written | |
1545 | * to it since, we do not need to stamp it. | |
1546 | */ | |
1547 | if (unlikely(sle64_to_cpu(uh->lowest_valid_usn) >= | |
1548 | i_size_read(vol->usnjrnl_j_ino))) { | |
1549 | if (likely(sle64_to_cpu(uh->lowest_valid_usn) == | |
1550 | i_size_read(vol->usnjrnl_j_ino))) { | |
1551 | ntfs_unmap_page(page); | |
1552 | ntfs_debug("$UsnJrnl is enabled but nothing has been " | |
1553 | "logged since it was last stamped. " | |
1554 | "Treating this as if the volume does " | |
1555 | "not have transaction logging " | |
1556 | "enabled."); | |
1557 | goto not_enabled; | |
1558 | } | |
1559 | ntfs_error(vol->sb, "$UsnJrnl has lowest valid usn (0x%llx) " | |
1560 | "which is out of bounds (0x%llx). $UsnJrnl " | |
1561 | "is corrupt.", | |
1562 | (long long)sle64_to_cpu(uh->lowest_valid_usn), | |
1563 | i_size_read(vol->usnjrnl_j_ino)); | |
1564 | ntfs_unmap_page(page); | |
c49c3111 | 1565 | return false; |
3f2faef0 AA |
1566 | } |
1567 | ntfs_unmap_page(page); | |
1568 | ntfs_debug("Done."); | |
c49c3111 | 1569 | return true; |
3f2faef0 AA |
1570 | } |
1571 | ||
1da177e4 LT |
1572 | /** |
1573 | * load_and_init_attrdef - load the attribute definitions table for a volume | |
1574 | * @vol: ntfs super block describing device whose attrdef to load | |
1575 | * | |
c49c3111 | 1576 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1577 | */ |
c49c3111 | 1578 | static bool load_and_init_attrdef(ntfs_volume *vol) |
1da177e4 | 1579 | { |
218357ff | 1580 | loff_t i_size; |
1da177e4 LT |
1581 | struct super_block *sb = vol->sb; |
1582 | struct inode *ino; | |
1583 | struct page *page; | |
218357ff | 1584 | pgoff_t index, max_index; |
1da177e4 LT |
1585 | unsigned int size; |
1586 | ||
1587 | ntfs_debug("Entering."); | |
1588 | /* Read attrdef table and setup vol->attrdef and vol->attrdef_size. */ | |
1589 | ino = ntfs_iget(sb, FILE_AttrDef); | |
1590 | if (IS_ERR(ino) || is_bad_inode(ino)) { | |
1591 | if (!IS_ERR(ino)) | |
1592 | iput(ino); | |
1593 | goto failed; | |
1594 | } | |
c002f425 | 1595 | NInoSetSparseDisabled(NTFS_I(ino)); |
1da177e4 | 1596 | /* The size of FILE_AttrDef must be above 0 and fit inside 31 bits. */ |
218357ff AA |
1597 | i_size = i_size_read(ino); |
1598 | if (i_size <= 0 || i_size > 0x7fffffff) | |
1da177e4 | 1599 | goto iput_failed; |
218357ff | 1600 | vol->attrdef = (ATTR_DEF*)ntfs_malloc_nofs(i_size); |
1da177e4 LT |
1601 | if (!vol->attrdef) |
1602 | goto iput_failed; | |
1603 | index = 0; | |
218357ff | 1604 | max_index = i_size >> PAGE_CACHE_SHIFT; |
1da177e4 LT |
1605 | size = PAGE_CACHE_SIZE; |
1606 | while (index < max_index) { | |
1607 | /* Read the attrdef table and copy it into the linear buffer. */ | |
1608 | read_partial_attrdef_page: | |
1609 | page = ntfs_map_page(ino->i_mapping, index); | |
1610 | if (IS_ERR(page)) | |
1611 | goto free_iput_failed; | |
1612 | memcpy((u8*)vol->attrdef + (index++ << PAGE_CACHE_SHIFT), | |
1613 | page_address(page), size); | |
1614 | ntfs_unmap_page(page); | |
1615 | }; | |
1616 | if (size == PAGE_CACHE_SIZE) { | |
218357ff | 1617 | size = i_size & ~PAGE_CACHE_MASK; |
1da177e4 LT |
1618 | if (size) |
1619 | goto read_partial_attrdef_page; | |
1620 | } | |
218357ff AA |
1621 | vol->attrdef_size = i_size; |
1622 | ntfs_debug("Read %llu bytes from $AttrDef.", i_size); | |
1da177e4 | 1623 | iput(ino); |
c49c3111 | 1624 | return true; |
1da177e4 LT |
1625 | free_iput_failed: |
1626 | ntfs_free(vol->attrdef); | |
1627 | vol->attrdef = NULL; | |
1628 | iput_failed: | |
1629 | iput(ino); | |
1630 | failed: | |
1631 | ntfs_error(sb, "Failed to initialize attribute definition table."); | |
c49c3111 | 1632 | return false; |
1da177e4 LT |
1633 | } |
1634 | ||
1635 | #endif /* NTFS_RW */ | |
1636 | ||
1637 | /** | |
1638 | * load_and_init_upcase - load the upcase table for an ntfs volume | |
1639 | * @vol: ntfs super block describing device whose upcase to load | |
1640 | * | |
c49c3111 | 1641 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1642 | */ |
c49c3111 | 1643 | static bool load_and_init_upcase(ntfs_volume *vol) |
1da177e4 | 1644 | { |
218357ff | 1645 | loff_t i_size; |
1da177e4 LT |
1646 | struct super_block *sb = vol->sb; |
1647 | struct inode *ino; | |
1648 | struct page *page; | |
218357ff | 1649 | pgoff_t index, max_index; |
1da177e4 LT |
1650 | unsigned int size; |
1651 | int i, max; | |
1652 | ||
1653 | ntfs_debug("Entering."); | |
1654 | /* Read upcase table and setup vol->upcase and vol->upcase_len. */ | |
1655 | ino = ntfs_iget(sb, FILE_UpCase); | |
1656 | if (IS_ERR(ino) || is_bad_inode(ino)) { | |
1657 | if (!IS_ERR(ino)) | |
1658 | iput(ino); | |
1659 | goto upcase_failed; | |
1660 | } | |
1661 | /* | |
1662 | * The upcase size must not be above 64k Unicode characters, must not | |
1663 | * be zero and must be a multiple of sizeof(ntfschar). | |
1664 | */ | |
218357ff AA |
1665 | i_size = i_size_read(ino); |
1666 | if (!i_size || i_size & (sizeof(ntfschar) - 1) || | |
1667 | i_size > 64ULL * 1024 * sizeof(ntfschar)) | |
1da177e4 | 1668 | goto iput_upcase_failed; |
218357ff | 1669 | vol->upcase = (ntfschar*)ntfs_malloc_nofs(i_size); |
1da177e4 LT |
1670 | if (!vol->upcase) |
1671 | goto iput_upcase_failed; | |
1672 | index = 0; | |
218357ff | 1673 | max_index = i_size >> PAGE_CACHE_SHIFT; |
1da177e4 LT |
1674 | size = PAGE_CACHE_SIZE; |
1675 | while (index < max_index) { | |
1676 | /* Read the upcase table and copy it into the linear buffer. */ | |
1677 | read_partial_upcase_page: | |
1678 | page = ntfs_map_page(ino->i_mapping, index); | |
1679 | if (IS_ERR(page)) | |
1680 | goto iput_upcase_failed; | |
1681 | memcpy((char*)vol->upcase + (index++ << PAGE_CACHE_SHIFT), | |
1682 | page_address(page), size); | |
1683 | ntfs_unmap_page(page); | |
1684 | }; | |
1685 | if (size == PAGE_CACHE_SIZE) { | |
218357ff | 1686 | size = i_size & ~PAGE_CACHE_MASK; |
1da177e4 LT |
1687 | if (size) |
1688 | goto read_partial_upcase_page; | |
1689 | } | |
218357ff | 1690 | vol->upcase_len = i_size >> UCHAR_T_SIZE_BITS; |
1da177e4 | 1691 | ntfs_debug("Read %llu bytes from $UpCase (expected %zu bytes).", |
218357ff | 1692 | i_size, 64 * 1024 * sizeof(ntfschar)); |
1da177e4 | 1693 | iput(ino); |
4e5e529a | 1694 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
1695 | if (!default_upcase) { |
1696 | ntfs_debug("Using volume specified $UpCase since default is " | |
1697 | "not present."); | |
4e5e529a | 1698 | mutex_unlock(&ntfs_lock); |
c49c3111 | 1699 | return true; |
1da177e4 LT |
1700 | } |
1701 | max = default_upcase_len; | |
1702 | if (max > vol->upcase_len) | |
1703 | max = vol->upcase_len; | |
1704 | for (i = 0; i < max; i++) | |
1705 | if (vol->upcase[i] != default_upcase[i]) | |
1706 | break; | |
1707 | if (i == max) { | |
1708 | ntfs_free(vol->upcase); | |
1709 | vol->upcase = default_upcase; | |
1710 | vol->upcase_len = max; | |
1711 | ntfs_nr_upcase_users++; | |
4e5e529a | 1712 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
1713 | ntfs_debug("Volume specified $UpCase matches default. Using " |
1714 | "default."); | |
c49c3111 | 1715 | return true; |
1da177e4 | 1716 | } |
4e5e529a | 1717 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
1718 | ntfs_debug("Using volume specified $UpCase since it does not match " |
1719 | "the default."); | |
c49c3111 | 1720 | return true; |
1da177e4 LT |
1721 | iput_upcase_failed: |
1722 | iput(ino); | |
1723 | ntfs_free(vol->upcase); | |
1724 | vol->upcase = NULL; | |
1725 | upcase_failed: | |
4e5e529a | 1726 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
1727 | if (default_upcase) { |
1728 | vol->upcase = default_upcase; | |
1729 | vol->upcase_len = default_upcase_len; | |
1730 | ntfs_nr_upcase_users++; | |
4e5e529a | 1731 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
1732 | ntfs_error(sb, "Failed to load $UpCase from the volume. Using " |
1733 | "default."); | |
c49c3111 | 1734 | return true; |
1da177e4 | 1735 | } |
4e5e529a | 1736 | mutex_unlock(&ntfs_lock); |
1da177e4 | 1737 | ntfs_error(sb, "Failed to initialize upcase table."); |
c49c3111 | 1738 | return false; |
1da177e4 LT |
1739 | } |
1740 | ||
59345374 IM |
1741 | /* |
1742 | * The lcn and mft bitmap inodes are NTFS-internal inodes with | |
1743 | * their own special locking rules: | |
1744 | */ | |
1745 | static struct lock_class_key | |
1746 | lcnbmp_runlist_lock_key, lcnbmp_mrec_lock_key, | |
1747 | mftbmp_runlist_lock_key, mftbmp_mrec_lock_key; | |
1748 | ||
1da177e4 LT |
1749 | /** |
1750 | * load_system_files - open the system files using normal functions | |
1751 | * @vol: ntfs super block describing device whose system files to load | |
1752 | * | |
1753 | * Open the system files with normal access functions and complete setting up | |
1754 | * the ntfs super block @vol. | |
1755 | * | |
c49c3111 | 1756 | * Return 'true' on success or 'false' on error. |
1da177e4 | 1757 | */ |
c49c3111 | 1758 | static bool load_system_files(ntfs_volume *vol) |
1da177e4 LT |
1759 | { |
1760 | struct super_block *sb = vol->sb; | |
1761 | MFT_RECORD *m; | |
1762 | VOLUME_INFORMATION *vi; | |
1763 | ntfs_attr_search_ctx *ctx; | |
ca8fd7a0 | 1764 | #ifdef NTFS_RW |
7d333d6c | 1765 | RESTART_PAGE_HEADER *rp; |
ca8fd7a0 AA |
1766 | int err; |
1767 | #endif /* NTFS_RW */ | |
1da177e4 LT |
1768 | |
1769 | ntfs_debug("Entering."); | |
1770 | #ifdef NTFS_RW | |
1771 | /* Get mft mirror inode compare the contents of $MFT and $MFTMirr. */ | |
1772 | if (!load_and_init_mft_mirror(vol) || !check_mft_mirror(vol)) { | |
1773 | static const char *es1 = "Failed to load $MFTMirr"; | |
1774 | static const char *es2 = "$MFTMirr does not match $MFT"; | |
1775 | static const char *es3 = ". Run ntfsfix and/or chkdsk."; | |
1776 | ||
1777 | /* If a read-write mount, convert it to a read-only mount. */ | |
1778 | if (!(sb->s_flags & MS_RDONLY)) { | |
1779 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
1780 | ON_ERRORS_CONTINUE))) { | |
1781 | ntfs_error(sb, "%s and neither on_errors=" | |
1782 | "continue nor on_errors=" | |
1783 | "remount-ro was specified%s", | |
1784 | !vol->mftmirr_ino ? es1 : es2, | |
1785 | es3); | |
1786 | goto iput_mirr_err_out; | |
1787 | } | |
24a44dca | 1788 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
1789 | ntfs_error(sb, "%s. Mounting read-only%s", |
1790 | !vol->mftmirr_ino ? es1 : es2, es3); | |
1791 | } else | |
1792 | ntfs_warning(sb, "%s. Will not be able to remount " | |
1793 | "read-write%s", | |
1794 | !vol->mftmirr_ino ? es1 : es2, es3); | |
1795 | /* This will prevent a read-write remount. */ | |
1796 | NVolSetErrors(vol); | |
1797 | } | |
1798 | #endif /* NTFS_RW */ | |
1799 | /* Get mft bitmap attribute inode. */ | |
1800 | vol->mftbmp_ino = ntfs_attr_iget(vol->mft_ino, AT_BITMAP, NULL, 0); | |
1801 | if (IS_ERR(vol->mftbmp_ino)) { | |
1802 | ntfs_error(sb, "Failed to load $MFT/$BITMAP attribute."); | |
1803 | goto iput_mirr_err_out; | |
1804 | } | |
59345374 IM |
1805 | lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->runlist.lock, |
1806 | &mftbmp_runlist_lock_key); | |
1807 | lockdep_set_class(&NTFS_I(vol->mftbmp_ino)->mrec_lock, | |
1808 | &mftbmp_mrec_lock_key); | |
1da177e4 LT |
1809 | /* Read upcase table and setup @vol->upcase and @vol->upcase_len. */ |
1810 | if (!load_and_init_upcase(vol)) | |
1811 | goto iput_mftbmp_err_out; | |
1812 | #ifdef NTFS_RW | |
1813 | /* | |
1814 | * Read attribute definitions table and setup @vol->attrdef and | |
1815 | * @vol->attrdef_size. | |
1816 | */ | |
1817 | if (!load_and_init_attrdef(vol)) | |
1818 | goto iput_upcase_err_out; | |
1819 | #endif /* NTFS_RW */ | |
1820 | /* | |
1821 | * Get the cluster allocation bitmap inode and verify the size, no | |
1822 | * need for any locking at this stage as we are already running | |
1823 | * exclusively as we are mount in progress task. | |
1824 | */ | |
1825 | vol->lcnbmp_ino = ntfs_iget(sb, FILE_Bitmap); | |
1826 | if (IS_ERR(vol->lcnbmp_ino) || is_bad_inode(vol->lcnbmp_ino)) { | |
1827 | if (!IS_ERR(vol->lcnbmp_ino)) | |
1828 | iput(vol->lcnbmp_ino); | |
1829 | goto bitmap_failed; | |
1830 | } | |
59345374 IM |
1831 | lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->runlist.lock, |
1832 | &lcnbmp_runlist_lock_key); | |
1833 | lockdep_set_class(&NTFS_I(vol->lcnbmp_ino)->mrec_lock, | |
1834 | &lcnbmp_mrec_lock_key); | |
1835 | ||
c002f425 | 1836 | NInoSetSparseDisabled(NTFS_I(vol->lcnbmp_ino)); |
218357ff | 1837 | if ((vol->nr_clusters + 7) >> 3 > i_size_read(vol->lcnbmp_ino)) { |
1da177e4 LT |
1838 | iput(vol->lcnbmp_ino); |
1839 | bitmap_failed: | |
1840 | ntfs_error(sb, "Failed to load $Bitmap."); | |
1841 | goto iput_attrdef_err_out; | |
1842 | } | |
1843 | /* | |
1844 | * Get the volume inode and setup our cache of the volume flags and | |
1845 | * version. | |
1846 | */ | |
1847 | vol->vol_ino = ntfs_iget(sb, FILE_Volume); | |
1848 | if (IS_ERR(vol->vol_ino) || is_bad_inode(vol->vol_ino)) { | |
1849 | if (!IS_ERR(vol->vol_ino)) | |
1850 | iput(vol->vol_ino); | |
1851 | volume_failed: | |
1852 | ntfs_error(sb, "Failed to load $Volume."); | |
1853 | goto iput_lcnbmp_err_out; | |
1854 | } | |
1855 | m = map_mft_record(NTFS_I(vol->vol_ino)); | |
1856 | if (IS_ERR(m)) { | |
1857 | iput_volume_failed: | |
1858 | iput(vol->vol_ino); | |
1859 | goto volume_failed; | |
1860 | } | |
1861 | if (!(ctx = ntfs_attr_get_search_ctx(NTFS_I(vol->vol_ino), m))) { | |
1862 | ntfs_error(sb, "Failed to get attribute search context."); | |
1863 | goto get_ctx_vol_failed; | |
1864 | } | |
1865 | if (ntfs_attr_lookup(AT_VOLUME_INFORMATION, NULL, 0, 0, 0, NULL, 0, | |
1866 | ctx) || ctx->attr->non_resident || ctx->attr->flags) { | |
1867 | err_put_vol: | |
1868 | ntfs_attr_put_search_ctx(ctx); | |
1869 | get_ctx_vol_failed: | |
1870 | unmap_mft_record(NTFS_I(vol->vol_ino)); | |
1871 | goto iput_volume_failed; | |
1872 | } | |
1873 | vi = (VOLUME_INFORMATION*)((char*)ctx->attr + | |
1874 | le16_to_cpu(ctx->attr->data.resident.value_offset)); | |
1875 | /* Some bounds checks. */ | |
1876 | if ((u8*)vi < (u8*)ctx->attr || (u8*)vi + | |
1877 | le32_to_cpu(ctx->attr->data.resident.value_length) > | |
1878 | (u8*)ctx->attr + le32_to_cpu(ctx->attr->length)) | |
1879 | goto err_put_vol; | |
1880 | /* Copy the volume flags and version to the ntfs_volume structure. */ | |
1881 | vol->vol_flags = vi->flags; | |
1882 | vol->major_ver = vi->major_ver; | |
1883 | vol->minor_ver = vi->minor_ver; | |
1884 | ntfs_attr_put_search_ctx(ctx); | |
1885 | unmap_mft_record(NTFS_I(vol->vol_ino)); | |
1886 | printk(KERN_INFO "NTFS volume version %i.%i.\n", vol->major_ver, | |
1887 | vol->minor_ver); | |
c002f425 AA |
1888 | if (vol->major_ver < 3 && NVolSparseEnabled(vol)) { |
1889 | ntfs_warning(vol->sb, "Disabling sparse support due to NTFS " | |
1890 | "volume version %i.%i (need at least version " | |
1891 | "3.0).", vol->major_ver, vol->minor_ver); | |
1892 | NVolClearSparseEnabled(vol); | |
1893 | } | |
1da177e4 LT |
1894 | #ifdef NTFS_RW |
1895 | /* Make sure that no unsupported volume flags are set. */ | |
1896 | if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) { | |
1897 | static const char *es1a = "Volume is dirty"; | |
1cf3109f AA |
1898 | static const char *es1b = "Volume has been modified by chkdsk"; |
1899 | static const char *es1c = "Volume has unsupported flags set"; | |
1900 | static const char *es2a = ". Run chkdsk and mount in Windows."; | |
1901 | static const char *es2b = ". Mount in Windows."; | |
1902 | const char *es1, *es2; | |
1903 | ||
1904 | es2 = es2a; | |
1905 | if (vol->vol_flags & VOLUME_IS_DIRTY) | |
1906 | es1 = es1a; | |
1907 | else if (vol->vol_flags & VOLUME_MODIFIED_BY_CHKDSK) { | |
1908 | es1 = es1b; | |
1909 | es2 = es2b; | |
1910 | } else { | |
1911 | es1 = es1c; | |
1912 | ntfs_warning(sb, "Unsupported volume flags 0x%x " | |
1913 | "encountered.", | |
1914 | (unsigned)le16_to_cpu(vol->vol_flags)); | |
1915 | } | |
1da177e4 LT |
1916 | /* If a read-write mount, convert it to a read-only mount. */ |
1917 | if (!(sb->s_flags & MS_RDONLY)) { | |
1918 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
1919 | ON_ERRORS_CONTINUE))) { | |
1920 | ntfs_error(sb, "%s and neither on_errors=" | |
1921 | "continue nor on_errors=" | |
1922 | "remount-ro was specified%s", | |
1923 | es1, es2); | |
1924 | goto iput_vol_err_out; | |
1925 | } | |
24a44dca | 1926 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
1927 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
1928 | } else | |
1929 | ntfs_warning(sb, "%s. Will not be able to remount " | |
1930 | "read-write%s", es1, es2); | |
1931 | /* | |
1932 | * Do not set NVolErrors() because ntfs_remount() re-checks the | |
1933 | * flags which we need to do in case any flags have changed. | |
1934 | */ | |
1935 | } | |
1936 | /* | |
1937 | * Get the inode for the logfile, check it and determine if the volume | |
1938 | * was shutdown cleanly. | |
1939 | */ | |
e7a1033b AA |
1940 | rp = NULL; |
1941 | if (!load_and_check_logfile(vol, &rp) || | |
1942 | !ntfs_is_logfile_clean(vol->logfile_ino, rp)) { | |
1da177e4 LT |
1943 | static const char *es1a = "Failed to load $LogFile"; |
1944 | static const char *es1b = "$LogFile is not clean"; | |
1945 | static const char *es2 = ". Mount in Windows."; | |
1946 | const char *es1; | |
1947 | ||
1948 | es1 = !vol->logfile_ino ? es1a : es1b; | |
1949 | /* If a read-write mount, convert it to a read-only mount. */ | |
1950 | if (!(sb->s_flags & MS_RDONLY)) { | |
1951 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
1952 | ON_ERRORS_CONTINUE))) { | |
1953 | ntfs_error(sb, "%s and neither on_errors=" | |
1954 | "continue nor on_errors=" | |
1955 | "remount-ro was specified%s", | |
1956 | es1, es2); | |
e7a1033b AA |
1957 | if (vol->logfile_ino) { |
1958 | BUG_ON(!rp); | |
1959 | ntfs_free(rp); | |
1960 | } | |
1da177e4 LT |
1961 | goto iput_logfile_err_out; |
1962 | } | |
24a44dca | 1963 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
1964 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
1965 | } else | |
1966 | ntfs_warning(sb, "%s. Will not be able to remount " | |
1967 | "read-write%s", es1, es2); | |
1968 | /* This will prevent a read-write remount. */ | |
1969 | NVolSetErrors(vol); | |
1970 | } | |
e7a1033b | 1971 | ntfs_free(rp); |
ca8fd7a0 AA |
1972 | #endif /* NTFS_RW */ |
1973 | /* Get the root directory inode so we can do path lookups. */ | |
1974 | vol->root_ino = ntfs_iget(sb, FILE_root); | |
1975 | if (IS_ERR(vol->root_ino) || is_bad_inode(vol->root_ino)) { | |
1976 | if (!IS_ERR(vol->root_ino)) | |
1977 | iput(vol->root_ino); | |
1978 | ntfs_error(sb, "Failed to load root directory."); | |
1979 | goto iput_logfile_err_out; | |
1980 | } | |
1981 | #ifdef NTFS_RW | |
1982 | /* | |
1983 | * Check if Windows is suspended to disk on the target volume. If it | |
1984 | * is hibernated, we must not write *anything* to the disk so set | |
1985 | * NVolErrors() without setting the dirty volume flag and mount | |
1986 | * read-only. This will prevent read-write remounting and it will also | |
1987 | * prevent all writes. | |
1988 | */ | |
1989 | err = check_windows_hibernation_status(vol); | |
1990 | if (unlikely(err)) { | |
1991 | static const char *es1a = "Failed to determine if Windows is " | |
1992 | "hibernated"; | |
1993 | static const char *es1b = "Windows is hibernated"; | |
1994 | static const char *es2 = ". Run chkdsk."; | |
1995 | const char *es1; | |
1996 | ||
1997 | es1 = err < 0 ? es1a : es1b; | |
1998 | /* If a read-write mount, convert it to a read-only mount. */ | |
1999 | if (!(sb->s_flags & MS_RDONLY)) { | |
2000 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2001 | ON_ERRORS_CONTINUE))) { | |
2002 | ntfs_error(sb, "%s and neither on_errors=" | |
2003 | "continue nor on_errors=" | |
2004 | "remount-ro was specified%s", | |
2005 | es1, es2); | |
2006 | goto iput_root_err_out; | |
2007 | } | |
24a44dca | 2008 | sb->s_flags |= MS_RDONLY; |
ca8fd7a0 AA |
2009 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
2010 | } else | |
2011 | ntfs_warning(sb, "%s. Will not be able to remount " | |
2012 | "read-write%s", es1, es2); | |
2013 | /* This will prevent a read-write remount. */ | |
2014 | NVolSetErrors(vol); | |
2015 | } | |
1da177e4 LT |
2016 | /* If (still) a read-write mount, mark the volume dirty. */ |
2017 | if (!(sb->s_flags & MS_RDONLY) && | |
2018 | ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) { | |
2019 | static const char *es1 = "Failed to set dirty bit in volume " | |
2020 | "information flags"; | |
2021 | static const char *es2 = ". Run chkdsk."; | |
2022 | ||
2023 | /* Convert to a read-only mount. */ | |
2024 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2025 | ON_ERRORS_CONTINUE))) { | |
2026 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2027 | "on_errors=remount-ro was specified%s", | |
2028 | es1, es2); | |
ca8fd7a0 | 2029 | goto iput_root_err_out; |
1da177e4 LT |
2030 | } |
2031 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
24a44dca | 2032 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
2033 | /* |
2034 | * Do not set NVolErrors() because ntfs_remount() might manage | |
2035 | * to set the dirty flag in which case all would be well. | |
2036 | */ | |
2037 | } | |
2038 | #if 0 | |
2039 | // TODO: Enable this code once we start modifying anything that is | |
2040 | // different between NTFS 1.2 and 3.x... | |
2041 | /* | |
2042 | * If (still) a read-write mount, set the NT4 compatibility flag on | |
2043 | * newer NTFS version volumes. | |
2044 | */ | |
2045 | if (!(sb->s_flags & MS_RDONLY) && (vol->major_ver > 1) && | |
2046 | ntfs_set_volume_flags(vol, VOLUME_MOUNTED_ON_NT4)) { | |
2047 | static const char *es1 = "Failed to set NT4 compatibility flag"; | |
2048 | static const char *es2 = ". Run chkdsk."; | |
2049 | ||
2050 | /* Convert to a read-only mount. */ | |
2051 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2052 | ON_ERRORS_CONTINUE))) { | |
2053 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2054 | "on_errors=remount-ro was specified%s", | |
2055 | es1, es2); | |
ca8fd7a0 | 2056 | goto iput_root_err_out; |
1da177e4 LT |
2057 | } |
2058 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
24a44dca | 2059 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
2060 | NVolSetErrors(vol); |
2061 | } | |
2062 | #endif | |
2063 | /* If (still) a read-write mount, empty the logfile. */ | |
2064 | if (!(sb->s_flags & MS_RDONLY) && | |
2065 | !ntfs_empty_logfile(vol->logfile_ino)) { | |
2066 | static const char *es1 = "Failed to empty $LogFile"; | |
2067 | static const char *es2 = ". Mount in Windows."; | |
2068 | ||
2069 | /* Convert to a read-only mount. */ | |
2070 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2071 | ON_ERRORS_CONTINUE))) { | |
2072 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2073 | "on_errors=remount-ro was specified%s", | |
2074 | es1, es2); | |
ca8fd7a0 | 2075 | goto iput_root_err_out; |
1da177e4 LT |
2076 | } |
2077 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
24a44dca | 2078 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
2079 | NVolSetErrors(vol); |
2080 | } | |
2081 | #endif /* NTFS_RW */ | |
1da177e4 | 2082 | /* If on NTFS versions before 3.0, we are done. */ |
3f2faef0 | 2083 | if (unlikely(vol->major_ver < 3)) |
c49c3111 | 2084 | return true; |
1da177e4 LT |
2085 | /* NTFS 3.0+ specific initialization. */ |
2086 | /* Get the security descriptors inode. */ | |
2087 | vol->secure_ino = ntfs_iget(sb, FILE_Secure); | |
2088 | if (IS_ERR(vol->secure_ino) || is_bad_inode(vol->secure_ino)) { | |
2089 | if (!IS_ERR(vol->secure_ino)) | |
2090 | iput(vol->secure_ino); | |
2091 | ntfs_error(sb, "Failed to load $Secure."); | |
2092 | goto iput_root_err_out; | |
2093 | } | |
3f2faef0 | 2094 | // TODO: Initialize security. |
1da177e4 LT |
2095 | /* Get the extended system files' directory inode. */ |
2096 | vol->extend_ino = ntfs_iget(sb, FILE_Extend); | |
2097 | if (IS_ERR(vol->extend_ino) || is_bad_inode(vol->extend_ino)) { | |
2098 | if (!IS_ERR(vol->extend_ino)) | |
2099 | iput(vol->extend_ino); | |
2100 | ntfs_error(sb, "Failed to load $Extend."); | |
2101 | goto iput_sec_err_out; | |
2102 | } | |
2103 | #ifdef NTFS_RW | |
2104 | /* Find the quota file, load it if present, and set it up. */ | |
2105 | if (!load_and_init_quota(vol)) { | |
2106 | static const char *es1 = "Failed to load $Quota"; | |
2107 | static const char *es2 = ". Run chkdsk."; | |
2108 | ||
2109 | /* If a read-write mount, convert it to a read-only mount. */ | |
2110 | if (!(sb->s_flags & MS_RDONLY)) { | |
2111 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2112 | ON_ERRORS_CONTINUE))) { | |
2113 | ntfs_error(sb, "%s and neither on_errors=" | |
2114 | "continue nor on_errors=" | |
2115 | "remount-ro was specified%s", | |
2116 | es1, es2); | |
2117 | goto iput_quota_err_out; | |
2118 | } | |
24a44dca | 2119 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
2120 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
2121 | } else | |
2122 | ntfs_warning(sb, "%s. Will not be able to remount " | |
2123 | "read-write%s", es1, es2); | |
2124 | /* This will prevent a read-write remount. */ | |
2125 | NVolSetErrors(vol); | |
2126 | } | |
2127 | /* If (still) a read-write mount, mark the quotas out of date. */ | |
2128 | if (!(sb->s_flags & MS_RDONLY) && | |
2129 | !ntfs_mark_quotas_out_of_date(vol)) { | |
2130 | static const char *es1 = "Failed to mark quotas out of date"; | |
2131 | static const char *es2 = ". Run chkdsk."; | |
2132 | ||
2133 | /* Convert to a read-only mount. */ | |
2134 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2135 | ON_ERRORS_CONTINUE))) { | |
2136 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2137 | "on_errors=remount-ro was specified%s", | |
2138 | es1, es2); | |
2139 | goto iput_quota_err_out; | |
2140 | } | |
2141 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
24a44dca | 2142 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
2143 | NVolSetErrors(vol); |
2144 | } | |
3f2faef0 AA |
2145 | /* |
2146 | * Find the transaction log file ($UsnJrnl), load it if present, check | |
2147 | * it, and set it up. | |
2148 | */ | |
2149 | if (!load_and_init_usnjrnl(vol)) { | |
2150 | static const char *es1 = "Failed to load $UsnJrnl"; | |
2151 | static const char *es2 = ". Run chkdsk."; | |
2152 | ||
2153 | /* If a read-write mount, convert it to a read-only mount. */ | |
2154 | if (!(sb->s_flags & MS_RDONLY)) { | |
2155 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2156 | ON_ERRORS_CONTINUE))) { | |
2157 | ntfs_error(sb, "%s and neither on_errors=" | |
2158 | "continue nor on_errors=" | |
2159 | "remount-ro was specified%s", | |
2160 | es1, es2); | |
2161 | goto iput_usnjrnl_err_out; | |
2162 | } | |
24a44dca | 2163 | sb->s_flags |= MS_RDONLY; |
3f2faef0 AA |
2164 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); |
2165 | } else | |
2166 | ntfs_warning(sb, "%s. Will not be able to remount " | |
2167 | "read-write%s", es1, es2); | |
2168 | /* This will prevent a read-write remount. */ | |
2169 | NVolSetErrors(vol); | |
2170 | } | |
2171 | /* If (still) a read-write mount, stamp the transaction log. */ | |
2172 | if (!(sb->s_flags & MS_RDONLY) && !ntfs_stamp_usnjrnl(vol)) { | |
2173 | static const char *es1 = "Failed to stamp transaction log " | |
2174 | "($UsnJrnl)"; | |
2175 | static const char *es2 = ". Run chkdsk."; | |
2176 | ||
2177 | /* Convert to a read-only mount. */ | |
2178 | if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO | | |
2179 | ON_ERRORS_CONTINUE))) { | |
2180 | ntfs_error(sb, "%s and neither on_errors=continue nor " | |
2181 | "on_errors=remount-ro was specified%s", | |
2182 | es1, es2); | |
2183 | goto iput_usnjrnl_err_out; | |
2184 | } | |
2185 | ntfs_error(sb, "%s. Mounting read-only%s", es1, es2); | |
24a44dca | 2186 | sb->s_flags |= MS_RDONLY; |
3f2faef0 AA |
2187 | NVolSetErrors(vol); |
2188 | } | |
1da177e4 | 2189 | #endif /* NTFS_RW */ |
c49c3111 | 2190 | return true; |
1da177e4 | 2191 | #ifdef NTFS_RW |
3f2faef0 AA |
2192 | iput_usnjrnl_err_out: |
2193 | if (vol->usnjrnl_j_ino) | |
2194 | iput(vol->usnjrnl_j_ino); | |
2195 | if (vol->usnjrnl_max_ino) | |
2196 | iput(vol->usnjrnl_max_ino); | |
2197 | if (vol->usnjrnl_ino) | |
2198 | iput(vol->usnjrnl_ino); | |
1da177e4 LT |
2199 | iput_quota_err_out: |
2200 | if (vol->quota_q_ino) | |
2201 | iput(vol->quota_q_ino); | |
2202 | if (vol->quota_ino) | |
2203 | iput(vol->quota_ino); | |
2204 | iput(vol->extend_ino); | |
2205 | #endif /* NTFS_RW */ | |
2206 | iput_sec_err_out: | |
2207 | iput(vol->secure_ino); | |
2208 | iput_root_err_out: | |
2209 | iput(vol->root_ino); | |
2210 | iput_logfile_err_out: | |
2211 | #ifdef NTFS_RW | |
2212 | if (vol->logfile_ino) | |
2213 | iput(vol->logfile_ino); | |
2214 | iput_vol_err_out: | |
2215 | #endif /* NTFS_RW */ | |
2216 | iput(vol->vol_ino); | |
2217 | iput_lcnbmp_err_out: | |
2218 | iput(vol->lcnbmp_ino); | |
2219 | iput_attrdef_err_out: | |
2220 | vol->attrdef_size = 0; | |
2221 | if (vol->attrdef) { | |
2222 | ntfs_free(vol->attrdef); | |
2223 | vol->attrdef = NULL; | |
2224 | } | |
2225 | #ifdef NTFS_RW | |
2226 | iput_upcase_err_out: | |
2227 | #endif /* NTFS_RW */ | |
2228 | vol->upcase_len = 0; | |
4e5e529a | 2229 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2230 | if (vol->upcase == default_upcase) { |
2231 | ntfs_nr_upcase_users--; | |
2232 | vol->upcase = NULL; | |
2233 | } | |
4e5e529a | 2234 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2235 | if (vol->upcase) { |
2236 | ntfs_free(vol->upcase); | |
2237 | vol->upcase = NULL; | |
2238 | } | |
2239 | iput_mftbmp_err_out: | |
2240 | iput(vol->mftbmp_ino); | |
2241 | iput_mirr_err_out: | |
2242 | #ifdef NTFS_RW | |
2243 | if (vol->mftmirr_ino) | |
2244 | iput(vol->mftmirr_ino); | |
2245 | #endif /* NTFS_RW */ | |
c49c3111 | 2246 | return false; |
1da177e4 LT |
2247 | } |
2248 | ||
2249 | /** | |
2250 | * ntfs_put_super - called by the vfs to unmount a volume | |
2251 | * @sb: vfs superblock of volume to unmount | |
2252 | * | |
2253 | * ntfs_put_super() is called by the VFS (from fs/super.c::do_umount()) when | |
2254 | * the volume is being unmounted (umount system call has been invoked) and it | |
2255 | * releases all inodes and memory belonging to the NTFS specific part of the | |
2256 | * super block. | |
2257 | */ | |
2258 | static void ntfs_put_super(struct super_block *sb) | |
2259 | { | |
2260 | ntfs_volume *vol = NTFS_SB(sb); | |
2261 | ||
2262 | ntfs_debug("Entering."); | |
6cfd0148 CH |
2263 | |
2264 | lock_kernel(); | |
2265 | ||
1da177e4 LT |
2266 | #ifdef NTFS_RW |
2267 | /* | |
2268 | * Commit all inodes while they are still open in case some of them | |
2269 | * cause others to be dirtied. | |
2270 | */ | |
2271 | ntfs_commit_inode(vol->vol_ino); | |
2272 | ||
2273 | /* NTFS 3.0+ specific. */ | |
2274 | if (vol->major_ver >= 3) { | |
3f2faef0 AA |
2275 | if (vol->usnjrnl_j_ino) |
2276 | ntfs_commit_inode(vol->usnjrnl_j_ino); | |
2277 | if (vol->usnjrnl_max_ino) | |
2278 | ntfs_commit_inode(vol->usnjrnl_max_ino); | |
2279 | if (vol->usnjrnl_ino) | |
2280 | ntfs_commit_inode(vol->usnjrnl_ino); | |
1da177e4 LT |
2281 | if (vol->quota_q_ino) |
2282 | ntfs_commit_inode(vol->quota_q_ino); | |
2283 | if (vol->quota_ino) | |
2284 | ntfs_commit_inode(vol->quota_ino); | |
2285 | if (vol->extend_ino) | |
2286 | ntfs_commit_inode(vol->extend_ino); | |
2287 | if (vol->secure_ino) | |
2288 | ntfs_commit_inode(vol->secure_ino); | |
2289 | } | |
2290 | ||
2291 | ntfs_commit_inode(vol->root_ino); | |
2292 | ||
2293 | down_write(&vol->lcnbmp_lock); | |
2294 | ntfs_commit_inode(vol->lcnbmp_ino); | |
2295 | up_write(&vol->lcnbmp_lock); | |
2296 | ||
2297 | down_write(&vol->mftbmp_lock); | |
2298 | ntfs_commit_inode(vol->mftbmp_ino); | |
2299 | up_write(&vol->mftbmp_lock); | |
2300 | ||
2301 | if (vol->logfile_ino) | |
2302 | ntfs_commit_inode(vol->logfile_ino); | |
2303 | ||
2304 | if (vol->mftmirr_ino) | |
2305 | ntfs_commit_inode(vol->mftmirr_ino); | |
2306 | ntfs_commit_inode(vol->mft_ino); | |
2307 | ||
2308 | /* | |
2309 | * If a read-write mount and no volume errors have occured, mark the | |
2310 | * volume clean. Also, re-commit all affected inodes. | |
2311 | */ | |
2312 | if (!(sb->s_flags & MS_RDONLY)) { | |
2313 | if (!NVolErrors(vol)) { | |
2314 | if (ntfs_clear_volume_flags(vol, VOLUME_IS_DIRTY)) | |
2315 | ntfs_warning(sb, "Failed to clear dirty bit " | |
2316 | "in volume information " | |
2317 | "flags. Run chkdsk."); | |
2318 | ntfs_commit_inode(vol->vol_ino); | |
2319 | ntfs_commit_inode(vol->root_ino); | |
2320 | if (vol->mftmirr_ino) | |
2321 | ntfs_commit_inode(vol->mftmirr_ino); | |
2322 | ntfs_commit_inode(vol->mft_ino); | |
2323 | } else { | |
2324 | ntfs_warning(sb, "Volume has errors. Leaving volume " | |
2325 | "marked dirty. Run chkdsk."); | |
2326 | } | |
2327 | } | |
2328 | #endif /* NTFS_RW */ | |
2329 | ||
2330 | iput(vol->vol_ino); | |
2331 | vol->vol_ino = NULL; | |
2332 | ||
2333 | /* NTFS 3.0+ specific clean up. */ | |
2334 | if (vol->major_ver >= 3) { | |
2335 | #ifdef NTFS_RW | |
3f2faef0 AA |
2336 | if (vol->usnjrnl_j_ino) { |
2337 | iput(vol->usnjrnl_j_ino); | |
2338 | vol->usnjrnl_j_ino = NULL; | |
2339 | } | |
2340 | if (vol->usnjrnl_max_ino) { | |
2341 | iput(vol->usnjrnl_max_ino); | |
2342 | vol->usnjrnl_max_ino = NULL; | |
2343 | } | |
2344 | if (vol->usnjrnl_ino) { | |
2345 | iput(vol->usnjrnl_ino); | |
2346 | vol->usnjrnl_ino = NULL; | |
2347 | } | |
1da177e4 LT |
2348 | if (vol->quota_q_ino) { |
2349 | iput(vol->quota_q_ino); | |
2350 | vol->quota_q_ino = NULL; | |
2351 | } | |
2352 | if (vol->quota_ino) { | |
2353 | iput(vol->quota_ino); | |
2354 | vol->quota_ino = NULL; | |
2355 | } | |
2356 | #endif /* NTFS_RW */ | |
2357 | if (vol->extend_ino) { | |
2358 | iput(vol->extend_ino); | |
2359 | vol->extend_ino = NULL; | |
2360 | } | |
2361 | if (vol->secure_ino) { | |
2362 | iput(vol->secure_ino); | |
2363 | vol->secure_ino = NULL; | |
2364 | } | |
2365 | } | |
2366 | ||
2367 | iput(vol->root_ino); | |
2368 | vol->root_ino = NULL; | |
2369 | ||
2370 | down_write(&vol->lcnbmp_lock); | |
2371 | iput(vol->lcnbmp_ino); | |
2372 | vol->lcnbmp_ino = NULL; | |
2373 | up_write(&vol->lcnbmp_lock); | |
2374 | ||
2375 | down_write(&vol->mftbmp_lock); | |
2376 | iput(vol->mftbmp_ino); | |
2377 | vol->mftbmp_ino = NULL; | |
2378 | up_write(&vol->mftbmp_lock); | |
2379 | ||
2380 | #ifdef NTFS_RW | |
2381 | if (vol->logfile_ino) { | |
2382 | iput(vol->logfile_ino); | |
2383 | vol->logfile_ino = NULL; | |
2384 | } | |
2385 | if (vol->mftmirr_ino) { | |
2386 | /* Re-commit the mft mirror and mft just in case. */ | |
2387 | ntfs_commit_inode(vol->mftmirr_ino); | |
2388 | ntfs_commit_inode(vol->mft_ino); | |
2389 | iput(vol->mftmirr_ino); | |
2390 | vol->mftmirr_ino = NULL; | |
2391 | } | |
2392 | /* | |
13205fb9 JA |
2393 | * We should have no dirty inodes left, due to |
2394 | * mft.c::ntfs_mft_writepage() cleaning all the dirty pages as | |
2395 | * the underlying mft records are written out and cleaned. | |
1da177e4 LT |
2396 | */ |
2397 | ntfs_commit_inode(vol->mft_ino); | |
2398 | write_inode_now(vol->mft_ino, 1); | |
1da177e4 LT |
2399 | #endif /* NTFS_RW */ |
2400 | ||
2401 | iput(vol->mft_ino); | |
2402 | vol->mft_ino = NULL; | |
2403 | ||
2404 | /* Throw away the table of attribute definitions. */ | |
2405 | vol->attrdef_size = 0; | |
2406 | if (vol->attrdef) { | |
2407 | ntfs_free(vol->attrdef); | |
2408 | vol->attrdef = NULL; | |
2409 | } | |
2410 | vol->upcase_len = 0; | |
2411 | /* | |
2412 | * Destroy the global default upcase table if necessary. Also decrease | |
2413 | * the number of upcase users if we are a user. | |
2414 | */ | |
4e5e529a | 2415 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2416 | if (vol->upcase == default_upcase) { |
2417 | ntfs_nr_upcase_users--; | |
2418 | vol->upcase = NULL; | |
2419 | } | |
2420 | if (!ntfs_nr_upcase_users && default_upcase) { | |
2421 | ntfs_free(default_upcase); | |
2422 | default_upcase = NULL; | |
2423 | } | |
2424 | if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users) | |
2425 | free_compression_buffers(); | |
4e5e529a | 2426 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2427 | if (vol->upcase) { |
2428 | ntfs_free(vol->upcase); | |
2429 | vol->upcase = NULL; | |
2430 | } | |
6d729e44 TG |
2431 | |
2432 | unload_nls(vol->nls_map); | |
2433 | ||
1da177e4 LT |
2434 | sb->s_fs_info = NULL; |
2435 | kfree(vol); | |
6cfd0148 CH |
2436 | |
2437 | unlock_kernel(); | |
1da177e4 LT |
2438 | } |
2439 | ||
2440 | /** | |
2441 | * get_nr_free_clusters - return the number of free clusters on a volume | |
2442 | * @vol: ntfs volume for which to obtain free cluster count | |
2443 | * | |
2444 | * Calculate the number of free clusters on the mounted NTFS volume @vol. We | |
2445 | * actually calculate the number of clusters in use instead because this | |
2446 | * allows us to not care about partial pages as these will be just zero filled | |
2447 | * and hence not be counted as allocated clusters. | |
2448 | * | |
2449 | * The only particularity is that clusters beyond the end of the logical ntfs | |
2450 | * volume will be marked as allocated to prevent errors which means we have to | |
2451 | * discount those at the end. This is important as the cluster bitmap always | |
2452 | * has a size in multiples of 8 bytes, i.e. up to 63 clusters could be outside | |
2453 | * the logical volume and marked in use when they are not as they do not exist. | |
2454 | * | |
2455 | * If any pages cannot be read we assume all clusters in the erroring pages are | |
2456 | * in use. This means we return an underestimate on errors which is better than | |
2457 | * an overestimate. | |
2458 | */ | |
2459 | static s64 get_nr_free_clusters(ntfs_volume *vol) | |
2460 | { | |
2461 | s64 nr_free = vol->nr_clusters; | |
1da177e4 | 2462 | struct address_space *mapping = vol->lcnbmp_ino->i_mapping; |
1da177e4 | 2463 | struct page *page; |
218357ff | 2464 | pgoff_t index, max_index; |
1da177e4 LT |
2465 | |
2466 | ntfs_debug("Entering."); | |
2467 | /* Serialize accesses to the cluster bitmap. */ | |
2468 | down_read(&vol->lcnbmp_lock); | |
2469 | /* | |
2470 | * Convert the number of bits into bytes rounded up, then convert into | |
2471 | * multiples of PAGE_CACHE_SIZE, rounding up so that if we have one | |
2472 | * full and one partial page max_index = 2. | |
2473 | */ | |
2474 | max_index = (((vol->nr_clusters + 7) >> 3) + PAGE_CACHE_SIZE - 1) >> | |
2475 | PAGE_CACHE_SHIFT; | |
218357ff AA |
2476 | /* Use multiples of 4 bytes, thus max_size is PAGE_CACHE_SIZE / 4. */ |
2477 | ntfs_debug("Reading $Bitmap, max_index = 0x%lx, max_size = 0x%lx.", | |
2478 | max_index, PAGE_CACHE_SIZE / 4); | |
2479 | for (index = 0; index < max_index; index++) { | |
c4af9644 AM |
2480 | unsigned long *kaddr; |
2481 | ||
1da177e4 LT |
2482 | /* |
2483 | * Read the page from page cache, getting it from backing store | |
2484 | * if necessary, and increment the use count. | |
2485 | */ | |
6fe6900e | 2486 | page = read_mapping_page(mapping, index, NULL); |
1da177e4 LT |
2487 | /* Ignore pages which errored synchronously. */ |
2488 | if (IS_ERR(page)) { | |
6fe6900e | 2489 | ntfs_debug("read_mapping_page() error. Skipping " |
1da177e4 LT |
2490 | "page (index 0x%lx).", index); |
2491 | nr_free -= PAGE_CACHE_SIZE * 8; | |
2492 | continue; | |
2493 | } | |
c4af9644 | 2494 | kaddr = kmap_atomic(page, KM_USER0); |
1da177e4 | 2495 | /* |
c4af9644 | 2496 | * Subtract the number of set bits. If this |
1da177e4 LT |
2497 | * is the last page and it is partial we don't really care as |
2498 | * it just means we do a little extra work but it won't affect | |
2499 | * the result as all out of range bytes are set to zero by | |
2500 | * ntfs_readpage(). | |
2501 | */ | |
c4af9644 AM |
2502 | nr_free -= bitmap_weight(kaddr, |
2503 | PAGE_CACHE_SIZE * BITS_PER_BYTE); | |
1da177e4 LT |
2504 | kunmap_atomic(kaddr, KM_USER0); |
2505 | page_cache_release(page); | |
2506 | } | |
2507 | ntfs_debug("Finished reading $Bitmap, last index = 0x%lx.", index - 1); | |
2508 | /* | |
2509 | * Fixup for eventual bits outside logical ntfs volume (see function | |
2510 | * description above). | |
2511 | */ | |
2512 | if (vol->nr_clusters & 63) | |
2513 | nr_free += 64 - (vol->nr_clusters & 63); | |
2514 | up_read(&vol->lcnbmp_lock); | |
2515 | /* If errors occured we may well have gone below zero, fix this. */ | |
2516 | if (nr_free < 0) | |
2517 | nr_free = 0; | |
2518 | ntfs_debug("Exiting."); | |
2519 | return nr_free; | |
2520 | } | |
2521 | ||
2522 | /** | |
2523 | * __get_nr_free_mft_records - return the number of free inodes on a volume | |
2524 | * @vol: ntfs volume for which to obtain free inode count | |
c002f425 | 2525 | * @nr_free: number of mft records in filesystem |
218357ff | 2526 | * @max_index: maximum number of pages containing set bits |
1da177e4 LT |
2527 | * |
2528 | * Calculate the number of free mft records (inodes) on the mounted NTFS | |
2529 | * volume @vol. We actually calculate the number of mft records in use instead | |
2530 | * because this allows us to not care about partial pages as these will be just | |
2531 | * zero filled and hence not be counted as allocated mft record. | |
2532 | * | |
2533 | * If any pages cannot be read we assume all mft records in the erroring pages | |
2534 | * are in use. This means we return an underestimate on errors which is better | |
2535 | * than an overestimate. | |
2536 | * | |
2537 | * NOTE: Caller must hold mftbmp_lock rw_semaphore for reading or writing. | |
2538 | */ | |
218357ff AA |
2539 | static unsigned long __get_nr_free_mft_records(ntfs_volume *vol, |
2540 | s64 nr_free, const pgoff_t max_index) | |
1da177e4 | 2541 | { |
1da177e4 | 2542 | struct address_space *mapping = vol->mftbmp_ino->i_mapping; |
1da177e4 | 2543 | struct page *page; |
218357ff | 2544 | pgoff_t index; |
1da177e4 LT |
2545 | |
2546 | ntfs_debug("Entering."); | |
218357ff | 2547 | /* Use multiples of 4 bytes, thus max_size is PAGE_CACHE_SIZE / 4. */ |
1da177e4 | 2548 | ntfs_debug("Reading $MFT/$BITMAP, max_index = 0x%lx, max_size = " |
218357ff AA |
2549 | "0x%lx.", max_index, PAGE_CACHE_SIZE / 4); |
2550 | for (index = 0; index < max_index; index++) { | |
c4af9644 AM |
2551 | unsigned long *kaddr; |
2552 | ||
1da177e4 LT |
2553 | /* |
2554 | * Read the page from page cache, getting it from backing store | |
2555 | * if necessary, and increment the use count. | |
2556 | */ | |
6fe6900e | 2557 | page = read_mapping_page(mapping, index, NULL); |
1da177e4 LT |
2558 | /* Ignore pages which errored synchronously. */ |
2559 | if (IS_ERR(page)) { | |
6fe6900e | 2560 | ntfs_debug("read_mapping_page() error. Skipping " |
1da177e4 | 2561 | "page (index 0x%lx).", index); |
1da177e4 LT |
2562 | nr_free -= PAGE_CACHE_SIZE * 8; |
2563 | continue; | |
2564 | } | |
c4af9644 | 2565 | kaddr = kmap_atomic(page, KM_USER0); |
1da177e4 | 2566 | /* |
c4af9644 | 2567 | * Subtract the number of set bits. If this |
1da177e4 LT |
2568 | * is the last page and it is partial we don't really care as |
2569 | * it just means we do a little extra work but it won't affect | |
2570 | * the result as all out of range bytes are set to zero by | |
2571 | * ntfs_readpage(). | |
2572 | */ | |
c4af9644 AM |
2573 | nr_free -= bitmap_weight(kaddr, |
2574 | PAGE_CACHE_SIZE * BITS_PER_BYTE); | |
1da177e4 LT |
2575 | kunmap_atomic(kaddr, KM_USER0); |
2576 | page_cache_release(page); | |
2577 | } | |
2578 | ntfs_debug("Finished reading $MFT/$BITMAP, last index = 0x%lx.", | |
2579 | index - 1); | |
2580 | /* If errors occured we may well have gone below zero, fix this. */ | |
2581 | if (nr_free < 0) | |
2582 | nr_free = 0; | |
2583 | ntfs_debug("Exiting."); | |
2584 | return nr_free; | |
2585 | } | |
2586 | ||
2587 | /** | |
2588 | * ntfs_statfs - return information about mounted NTFS volume | |
726c3342 | 2589 | * @dentry: dentry from mounted volume |
1da177e4 LT |
2590 | * @sfs: statfs structure in which to return the information |
2591 | * | |
726c3342 | 2592 | * Return information about the mounted NTFS volume @dentry in the statfs structure |
1da177e4 LT |
2593 | * pointed to by @sfs (this is initialized with zeros before ntfs_statfs is |
2594 | * called). We interpret the values to be correct of the moment in time at | |
2595 | * which we are called. Most values are variable otherwise and this isn't just | |
2596 | * the free values but the totals as well. For example we can increase the | |
2597 | * total number of file nodes if we run out and we can keep doing this until | |
2598 | * there is no more space on the volume left at all. | |
2599 | * | |
2600 | * Called from vfs_statfs which is used to handle the statfs, fstatfs, and | |
2601 | * ustat system calls. | |
2602 | * | |
2603 | * Return 0 on success or -errno on error. | |
2604 | */ | |
726c3342 | 2605 | static int ntfs_statfs(struct dentry *dentry, struct kstatfs *sfs) |
1da177e4 | 2606 | { |
726c3342 | 2607 | struct super_block *sb = dentry->d_sb; |
1da177e4 | 2608 | s64 size; |
218357ff AA |
2609 | ntfs_volume *vol = NTFS_SB(sb); |
2610 | ntfs_inode *mft_ni = NTFS_I(vol->mft_ino); | |
2611 | pgoff_t max_index; | |
2612 | unsigned long flags; | |
1da177e4 LT |
2613 | |
2614 | ntfs_debug("Entering."); | |
2615 | /* Type of filesystem. */ | |
2616 | sfs->f_type = NTFS_SB_MAGIC; | |
2617 | /* Optimal transfer block size. */ | |
2618 | sfs->f_bsize = PAGE_CACHE_SIZE; | |
2619 | /* | |
c002f425 | 2620 | * Total data blocks in filesystem in units of f_bsize and since |
1da177e4 LT |
2621 | * inodes are also stored in data blocs ($MFT is a file) this is just |
2622 | * the total clusters. | |
2623 | */ | |
2624 | sfs->f_blocks = vol->nr_clusters << vol->cluster_size_bits >> | |
2625 | PAGE_CACHE_SHIFT; | |
c002f425 | 2626 | /* Free data blocks in filesystem in units of f_bsize. */ |
1da177e4 LT |
2627 | size = get_nr_free_clusters(vol) << vol->cluster_size_bits >> |
2628 | PAGE_CACHE_SHIFT; | |
2629 | if (size < 0LL) | |
2630 | size = 0LL; | |
2631 | /* Free blocks avail to non-superuser, same as above on NTFS. */ | |
2632 | sfs->f_bavail = sfs->f_bfree = size; | |
2633 | /* Serialize accesses to the inode bitmap. */ | |
2634 | down_read(&vol->mftbmp_lock); | |
218357ff AA |
2635 | read_lock_irqsave(&mft_ni->size_lock, flags); |
2636 | size = i_size_read(vol->mft_ino) >> vol->mft_record_size_bits; | |
2637 | /* | |
2638 | * Convert the maximum number of set bits into bytes rounded up, then | |
2639 | * convert into multiples of PAGE_CACHE_SIZE, rounding up so that if we | |
2640 | * have one full and one partial page max_index = 2. | |
2641 | */ | |
2642 | max_index = ((((mft_ni->initialized_size >> vol->mft_record_size_bits) | |
2643 | + 7) >> 3) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; | |
2644 | read_unlock_irqrestore(&mft_ni->size_lock, flags); | |
c002f425 | 2645 | /* Number of inodes in filesystem (at this point in time). */ |
218357ff | 2646 | sfs->f_files = size; |
1da177e4 | 2647 | /* Free inodes in fs (based on current total count). */ |
218357ff | 2648 | sfs->f_ffree = __get_nr_free_mft_records(vol, size, max_index); |
1da177e4 LT |
2649 | up_read(&vol->mftbmp_lock); |
2650 | /* | |
2651 | * File system id. This is extremely *nix flavour dependent and even | |
2652 | * within Linux itself all fs do their own thing. I interpret this to | |
2653 | * mean a unique id associated with the mounted fs and not the id | |
c002f425 AA |
2654 | * associated with the filesystem driver, the latter is already given |
2655 | * by the filesystem type in sfs->f_type. Thus we use the 64-bit | |
1da177e4 LT |
2656 | * volume serial number splitting it into two 32-bit parts. We enter |
2657 | * the least significant 32-bits in f_fsid[0] and the most significant | |
2658 | * 32-bits in f_fsid[1]. | |
2659 | */ | |
2660 | sfs->f_fsid.val[0] = vol->serial_no & 0xffffffff; | |
2661 | sfs->f_fsid.val[1] = (vol->serial_no >> 32) & 0xffffffff; | |
2662 | /* Maximum length of filenames. */ | |
2663 | sfs->f_namelen = NTFS_MAX_NAME_LEN; | |
2664 | return 0; | |
2665 | } | |
2666 | ||
a9185b41 CH |
2667 | #ifdef NTFS_RW |
2668 | static int ntfs_write_inode(struct inode *vi, struct writeback_control *wbc) | |
2669 | { | |
2670 | return __ntfs_write_inode(vi, wbc->sync_mode == WB_SYNC_ALL); | |
2671 | } | |
2672 | #endif | |
2673 | ||
1da177e4 LT |
2674 | /** |
2675 | * The complete super operations. | |
2676 | */ | |
ee9b6d61 | 2677 | static const struct super_operations ntfs_sops = { |
1da177e4 LT |
2678 | .alloc_inode = ntfs_alloc_big_inode, /* VFS: Allocate new inode. */ |
2679 | .destroy_inode = ntfs_destroy_big_inode, /* VFS: Deallocate inode. */ | |
1da177e4 LT |
2680 | #ifdef NTFS_RW |
2681 | //.dirty_inode = NULL, /* VFS: Called from | |
2682 | // __mark_inode_dirty(). */ | |
2683 | .write_inode = ntfs_write_inode, /* VFS: Write dirty inode to | |
2684 | disk. */ | |
2685 | //.drop_inode = NULL, /* VFS: Called just after the | |
2686 | // inode reference count has | |
2687 | // been decreased to zero. | |
2688 | // NOTE: The inode lock is | |
2689 | // held. See fs/inode.c:: | |
2690 | // generic_drop_inode(). */ | |
2691 | //.delete_inode = NULL, /* VFS: Delete inode from disk. | |
2692 | // Called when i_count becomes | |
2693 | // 0 and i_nlink is also 0. */ | |
2694 | //.write_super = NULL, /* Flush dirty super block to | |
2695 | // disk. */ | |
2696 | //.sync_fs = NULL, /* ? */ | |
2697 | //.write_super_lockfs = NULL, /* ? */ | |
2698 | //.unlockfs = NULL, /* ? */ | |
2699 | #endif /* NTFS_RW */ | |
2700 | .put_super = ntfs_put_super, /* Syscall: umount. */ | |
2701 | .statfs = ntfs_statfs, /* Syscall: statfs */ | |
2702 | .remount_fs = ntfs_remount, /* Syscall: mount -o remount. */ | |
2703 | .clear_inode = ntfs_clear_big_inode, /* VFS: Called when an inode is | |
2704 | removed from memory. */ | |
2705 | //.umount_begin = NULL, /* Forced umount. */ | |
2706 | .show_options = ntfs_show_options, /* Show mount options in | |
2707 | proc. */ | |
2708 | }; | |
2709 | ||
1da177e4 | 2710 | /** |
c002f425 AA |
2711 | * ntfs_fill_super - mount an ntfs filesystem |
2712 | * @sb: super block of ntfs filesystem to mount | |
1da177e4 LT |
2713 | * @opt: string containing the mount options |
2714 | * @silent: silence error output | |
2715 | * | |
2716 | * ntfs_fill_super() is called by the VFS to mount the device described by @sb | |
c002f425 | 2717 | * with the mount otions in @data with the NTFS filesystem. |
1da177e4 LT |
2718 | * |
2719 | * If @silent is true, remain silent even if errors are detected. This is used | |
c002f425 AA |
2720 | * during bootup, when the kernel tries to mount the root filesystem with all |
2721 | * registered filesystems one after the other until one succeeds. This implies | |
2722 | * that all filesystems except the correct one will quite correctly and | |
1da177e4 LT |
2723 | * expectedly return an error, but nobody wants to see error messages when in |
2724 | * fact this is what is supposed to happen. | |
2725 | * | |
2726 | * NOTE: @sb->s_flags contains the mount options flags. | |
2727 | */ | |
2728 | static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent) | |
2729 | { | |
2730 | ntfs_volume *vol; | |
2731 | struct buffer_head *bh; | |
2732 | struct inode *tmp_ino; | |
78af34f0 | 2733 | int blocksize, result; |
1da177e4 | 2734 | |
59345374 IM |
2735 | /* |
2736 | * We do a pretty difficult piece of bootstrap by reading the | |
2737 | * MFT (and other metadata) from disk into memory. We'll only | |
2738 | * release this metadata during umount, so the locking patterns | |
2739 | * observed during bootstrap do not count. So turn off the | |
2740 | * observation of locking patterns (strictly for this context | |
2741 | * only) while mounting NTFS. [The validator is still active | |
2742 | * otherwise, even for this context: it will for example record | |
2743 | * lock class registrations.] | |
2744 | */ | |
2745 | lockdep_off(); | |
1da177e4 LT |
2746 | ntfs_debug("Entering."); |
2747 | #ifndef NTFS_RW | |
24a44dca | 2748 | sb->s_flags |= MS_RDONLY; |
1da177e4 LT |
2749 | #endif /* ! NTFS_RW */ |
2750 | /* Allocate a new ntfs_volume and place it in sb->s_fs_info. */ | |
2751 | sb->s_fs_info = kmalloc(sizeof(ntfs_volume), GFP_NOFS); | |
2752 | vol = NTFS_SB(sb); | |
2753 | if (!vol) { | |
2754 | if (!silent) | |
2755 | ntfs_error(sb, "Allocation of NTFS volume structure " | |
2756 | "failed. Aborting mount..."); | |
59345374 | 2757 | lockdep_on(); |
1da177e4 LT |
2758 | return -ENOMEM; |
2759 | } | |
2760 | /* Initialize ntfs_volume structure. */ | |
442d207e AA |
2761 | *vol = (ntfs_volume) { |
2762 | .sb = sb, | |
2763 | /* | |
2764 | * Default is group and other don't have any access to files or | |
2765 | * directories while owner has full access. Further, files by | |
2766 | * default are not executable but directories are of course | |
2767 | * browseable. | |
2768 | */ | |
2769 | .fmask = 0177, | |
2770 | .dmask = 0077, | |
2771 | }; | |
1da177e4 | 2772 | init_rwsem(&vol->mftbmp_lock); |
1da177e4 | 2773 | init_rwsem(&vol->lcnbmp_lock); |
1da177e4 LT |
2774 | |
2775 | unlock_kernel(); | |
2776 | ||
c002f425 AA |
2777 | /* By default, enable sparse support. */ |
2778 | NVolSetSparseEnabled(vol); | |
2779 | ||
1da177e4 LT |
2780 | /* Important to get the mount options dealt with now. */ |
2781 | if (!parse_options(vol, (char*)opt)) | |
2782 | goto err_out_now; | |
2783 | ||
78af34f0 | 2784 | /* We support sector sizes up to the PAGE_CACHE_SIZE. */ |
e1defc4f | 2785 | if (bdev_logical_block_size(sb->s_bdev) > PAGE_CACHE_SIZE) { |
78af34f0 AA |
2786 | if (!silent) |
2787 | ntfs_error(sb, "Device has unsupported sector size " | |
2788 | "(%i). The maximum supported sector " | |
2789 | "size on this architecture is %lu " | |
2790 | "bytes.", | |
e1defc4f | 2791 | bdev_logical_block_size(sb->s_bdev), |
78af34f0 AA |
2792 | PAGE_CACHE_SIZE); |
2793 | goto err_out_now; | |
2794 | } | |
1da177e4 | 2795 | /* |
78af34f0 AA |
2796 | * Setup the device access block size to NTFS_BLOCK_SIZE or the hard |
2797 | * sector size, whichever is bigger. | |
1da177e4 | 2798 | */ |
78af34f0 AA |
2799 | blocksize = sb_min_blocksize(sb, NTFS_BLOCK_SIZE); |
2800 | if (blocksize < NTFS_BLOCK_SIZE) { | |
1da177e4 | 2801 | if (!silent) |
78af34f0 | 2802 | ntfs_error(sb, "Unable to set device block size."); |
1da177e4 LT |
2803 | goto err_out_now; |
2804 | } | |
78af34f0 AA |
2805 | BUG_ON(blocksize != sb->s_blocksize); |
2806 | ntfs_debug("Set device block size to %i bytes (block size bits %i).", | |
2807 | blocksize, sb->s_blocksize_bits); | |
2808 | /* Determine the size of the device in units of block_size bytes. */ | |
2809 | if (!i_size_read(sb->s_bdev->bd_inode)) { | |
1da177e4 | 2810 | if (!silent) |
78af34f0 | 2811 | ntfs_error(sb, "Unable to determine device size."); |
1da177e4 LT |
2812 | goto err_out_now; |
2813 | } | |
218357ff | 2814 | vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >> |
78af34f0 | 2815 | sb->s_blocksize_bits; |
1da177e4 LT |
2816 | /* Read the boot sector and return unlocked buffer head to it. */ |
2817 | if (!(bh = read_ntfs_boot_sector(sb, silent))) { | |
2818 | if (!silent) | |
2819 | ntfs_error(sb, "Not an NTFS volume."); | |
2820 | goto err_out_now; | |
2821 | } | |
1da177e4 | 2822 | /* |
78af34f0 | 2823 | * Extract the data from the boot sector and setup the ntfs volume |
1da177e4 LT |
2824 | * using it. |
2825 | */ | |
2826 | result = parse_ntfs_boot_sector(vol, (NTFS_BOOT_SECTOR*)bh->b_data); | |
1da177e4 | 2827 | brelse(bh); |
1da177e4 LT |
2828 | if (!result) { |
2829 | if (!silent) | |
2830 | ntfs_error(sb, "Unsupported NTFS filesystem."); | |
2831 | goto err_out_now; | |
2832 | } | |
1da177e4 | 2833 | /* |
78af34f0 AA |
2834 | * If the boot sector indicates a sector size bigger than the current |
2835 | * device block size, switch the device block size to the sector size. | |
2836 | * TODO: It may be possible to support this case even when the set | |
2837 | * below fails, we would just be breaking up the i/o for each sector | |
2838 | * into multiple blocks for i/o purposes but otherwise it should just | |
2839 | * work. However it is safer to leave disabled until someone hits this | |
2840 | * error message and then we can get them to try it without the setting | |
2841 | * so we know for sure that it works. | |
1da177e4 | 2842 | */ |
78af34f0 AA |
2843 | if (vol->sector_size > blocksize) { |
2844 | blocksize = sb_set_blocksize(sb, vol->sector_size); | |
2845 | if (blocksize != vol->sector_size) { | |
2846 | if (!silent) | |
2847 | ntfs_error(sb, "Unable to set device block " | |
2848 | "size to sector size (%i).", | |
2849 | vol->sector_size); | |
2850 | goto err_out_now; | |
2851 | } | |
2852 | BUG_ON(blocksize != sb->s_blocksize); | |
2853 | vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >> | |
2854 | sb->s_blocksize_bits; | |
2855 | ntfs_debug("Changed device block size to %i bytes (block size " | |
2856 | "bits %i) to match volume sector size.", | |
2857 | blocksize, sb->s_blocksize_bits); | |
2858 | } | |
2859 | /* Initialize the cluster and mft allocators. */ | |
2860 | ntfs_setup_allocators(vol); | |
1da177e4 LT |
2861 | /* Setup remaining fields in the super block. */ |
2862 | sb->s_magic = NTFS_SB_MAGIC; | |
1da177e4 LT |
2863 | /* |
2864 | * Ntfs allows 63 bits for the file size, i.e. correct would be: | |
2865 | * sb->s_maxbytes = ~0ULL >> 1; | |
2866 | * But the kernel uses a long as the page cache page index which on | |
2867 | * 32-bit architectures is only 32-bits. MAX_LFS_FILESIZE is kernel | |
2868 | * defined to the maximum the page cache page index can cope with | |
2869 | * without overflowing the index or to 2^63 - 1, whichever is smaller. | |
2870 | */ | |
2871 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
78af34f0 | 2872 | /* Ntfs measures time in 100ns intervals. */ |
1da177e4 | 2873 | sb->s_time_gran = 100; |
1da177e4 LT |
2874 | /* |
2875 | * Now load the metadata required for the page cache and our address | |
2876 | * space operations to function. We do this by setting up a specialised | |
2877 | * read_inode method and then just calling the normal iget() to obtain | |
2878 | * the inode for $MFT which is sufficient to allow our normal inode | |
2879 | * operations and associated address space operations to function. | |
2880 | */ | |
2881 | sb->s_op = &ntfs_sops; | |
2882 | tmp_ino = new_inode(sb); | |
2883 | if (!tmp_ino) { | |
2884 | if (!silent) | |
2885 | ntfs_error(sb, "Failed to load essential metadata."); | |
2886 | goto err_out_now; | |
2887 | } | |
2888 | tmp_ino->i_ino = FILE_MFT; | |
2889 | insert_inode_hash(tmp_ino); | |
2890 | if (ntfs_read_inode_mount(tmp_ino) < 0) { | |
2891 | if (!silent) | |
2892 | ntfs_error(sb, "Failed to load essential metadata."); | |
2893 | goto iput_tmp_ino_err_out_now; | |
2894 | } | |
4e5e529a | 2895 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2896 | /* |
2897 | * The current mount is a compression user if the cluster size is | |
2898 | * less than or equal 4kiB. | |
2899 | */ | |
2900 | if (vol->cluster_size <= 4096 && !ntfs_nr_compression_users++) { | |
2901 | result = allocate_compression_buffers(); | |
2902 | if (result) { | |
2903 | ntfs_error(NULL, "Failed to allocate buffers " | |
2904 | "for compression engine."); | |
2905 | ntfs_nr_compression_users--; | |
4e5e529a | 2906 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2907 | goto iput_tmp_ino_err_out_now; |
2908 | } | |
2909 | } | |
2910 | /* | |
2911 | * Generate the global default upcase table if necessary. Also | |
2912 | * temporarily increment the number of upcase users to avoid race | |
2913 | * conditions with concurrent (u)mounts. | |
2914 | */ | |
2915 | if (!default_upcase) | |
2916 | default_upcase = generate_default_upcase(); | |
2917 | ntfs_nr_upcase_users++; | |
4e5e529a | 2918 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2919 | /* |
2920 | * From now on, ignore @silent parameter. If we fail below this line, | |
2921 | * it will be due to a corrupt fs or a system error, so we report it. | |
2922 | */ | |
2923 | /* | |
2924 | * Open the system files with normal access functions and complete | |
2925 | * setting up the ntfs super block. | |
2926 | */ | |
2927 | if (!load_system_files(vol)) { | |
2928 | ntfs_error(sb, "Failed to load system files."); | |
2929 | goto unl_upcase_iput_tmp_ino_err_out_now; | |
2930 | } | |
2931 | if ((sb->s_root = d_alloc_root(vol->root_ino))) { | |
2932 | /* We increment i_count simulating an ntfs_iget(). */ | |
2933 | atomic_inc(&vol->root_ino->i_count); | |
2934 | ntfs_debug("Exiting, status successful."); | |
2935 | /* Release the default upcase if it has no users. */ | |
4e5e529a | 2936 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
2937 | if (!--ntfs_nr_upcase_users && default_upcase) { |
2938 | ntfs_free(default_upcase); | |
2939 | default_upcase = NULL; | |
2940 | } | |
4e5e529a | 2941 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
2942 | sb->s_export_op = &ntfs_export_ops; |
2943 | lock_kernel(); | |
59345374 | 2944 | lockdep_on(); |
1da177e4 LT |
2945 | return 0; |
2946 | } | |
2947 | ntfs_error(sb, "Failed to allocate root directory."); | |
2948 | /* Clean up after the successful load_system_files() call from above. */ | |
2949 | // TODO: Use ntfs_put_super() instead of repeating all this code... | |
2950 | // FIXME: Should mark the volume clean as the error is most likely | |
2951 | // -ENOMEM. | |
2952 | iput(vol->vol_ino); | |
2953 | vol->vol_ino = NULL; | |
2954 | /* NTFS 3.0+ specific clean up. */ | |
2955 | if (vol->major_ver >= 3) { | |
2956 | #ifdef NTFS_RW | |
3f2faef0 AA |
2957 | if (vol->usnjrnl_j_ino) { |
2958 | iput(vol->usnjrnl_j_ino); | |
2959 | vol->usnjrnl_j_ino = NULL; | |
2960 | } | |
2961 | if (vol->usnjrnl_max_ino) { | |
2962 | iput(vol->usnjrnl_max_ino); | |
2963 | vol->usnjrnl_max_ino = NULL; | |
2964 | } | |
2965 | if (vol->usnjrnl_ino) { | |
2966 | iput(vol->usnjrnl_ino); | |
2967 | vol->usnjrnl_ino = NULL; | |
2968 | } | |
1da177e4 LT |
2969 | if (vol->quota_q_ino) { |
2970 | iput(vol->quota_q_ino); | |
2971 | vol->quota_q_ino = NULL; | |
2972 | } | |
2973 | if (vol->quota_ino) { | |
2974 | iput(vol->quota_ino); | |
2975 | vol->quota_ino = NULL; | |
2976 | } | |
2977 | #endif /* NTFS_RW */ | |
2978 | if (vol->extend_ino) { | |
2979 | iput(vol->extend_ino); | |
2980 | vol->extend_ino = NULL; | |
2981 | } | |
2982 | if (vol->secure_ino) { | |
2983 | iput(vol->secure_ino); | |
2984 | vol->secure_ino = NULL; | |
2985 | } | |
2986 | } | |
2987 | iput(vol->root_ino); | |
2988 | vol->root_ino = NULL; | |
2989 | iput(vol->lcnbmp_ino); | |
2990 | vol->lcnbmp_ino = NULL; | |
2991 | iput(vol->mftbmp_ino); | |
2992 | vol->mftbmp_ino = NULL; | |
2993 | #ifdef NTFS_RW | |
2994 | if (vol->logfile_ino) { | |
2995 | iput(vol->logfile_ino); | |
2996 | vol->logfile_ino = NULL; | |
2997 | } | |
2998 | if (vol->mftmirr_ino) { | |
2999 | iput(vol->mftmirr_ino); | |
3000 | vol->mftmirr_ino = NULL; | |
3001 | } | |
3002 | #endif /* NTFS_RW */ | |
3003 | /* Throw away the table of attribute definitions. */ | |
3004 | vol->attrdef_size = 0; | |
3005 | if (vol->attrdef) { | |
3006 | ntfs_free(vol->attrdef); | |
3007 | vol->attrdef = NULL; | |
3008 | } | |
3009 | vol->upcase_len = 0; | |
4e5e529a | 3010 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
3011 | if (vol->upcase == default_upcase) { |
3012 | ntfs_nr_upcase_users--; | |
3013 | vol->upcase = NULL; | |
3014 | } | |
4e5e529a | 3015 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
3016 | if (vol->upcase) { |
3017 | ntfs_free(vol->upcase); | |
3018 | vol->upcase = NULL; | |
3019 | } | |
3020 | if (vol->nls_map) { | |
3021 | unload_nls(vol->nls_map); | |
3022 | vol->nls_map = NULL; | |
3023 | } | |
3024 | /* Error exit code path. */ | |
3025 | unl_upcase_iput_tmp_ino_err_out_now: | |
3026 | /* | |
3027 | * Decrease the number of upcase users and destroy the global default | |
3028 | * upcase table if necessary. | |
3029 | */ | |
4e5e529a | 3030 | mutex_lock(&ntfs_lock); |
1da177e4 LT |
3031 | if (!--ntfs_nr_upcase_users && default_upcase) { |
3032 | ntfs_free(default_upcase); | |
3033 | default_upcase = NULL; | |
3034 | } | |
3035 | if (vol->cluster_size <= 4096 && !--ntfs_nr_compression_users) | |
3036 | free_compression_buffers(); | |
4e5e529a | 3037 | mutex_unlock(&ntfs_lock); |
1da177e4 LT |
3038 | iput_tmp_ino_err_out_now: |
3039 | iput(tmp_ino); | |
3040 | if (vol->mft_ino && vol->mft_ino != tmp_ino) | |
3041 | iput(vol->mft_ino); | |
3042 | vol->mft_ino = NULL; | |
3043 | /* | |
3044 | * This is needed to get ntfs_clear_extent_inode() called for each | |
3045 | * inode we have ever called ntfs_iget()/iput() on, otherwise we A) | |
3046 | * leak resources and B) a subsequent mount fails automatically due to | |
3047 | * ntfs_iget() never calling down into our ntfs_read_locked_inode() | |
3048 | * method again... FIXME: Do we need to do this twice now because of | |
3049 | * attribute inodes? I think not, so leave as is for now... (AIA) | |
3050 | */ | |
3051 | if (invalidate_inodes(sb)) { | |
3052 | ntfs_error(sb, "Busy inodes left. This is most likely a NTFS " | |
3053 | "driver bug."); | |
3054 | /* Copied from fs/super.c. I just love this message. (-; */ | |
3055 | printk("NTFS: Busy inodes after umount. Self-destruct in 5 " | |
3056 | "seconds. Have a nice day...\n"); | |
3057 | } | |
3058 | /* Errors at this stage are irrelevant. */ | |
3059 | err_out_now: | |
3060 | lock_kernel(); | |
3061 | sb->s_fs_info = NULL; | |
3062 | kfree(vol); | |
3063 | ntfs_debug("Failed, returning -EINVAL."); | |
59345374 | 3064 | lockdep_on(); |
1da177e4 LT |
3065 | return -EINVAL; |
3066 | } | |
3067 | ||
3068 | /* | |
3069 | * This is a slab cache to optimize allocations and deallocations of Unicode | |
3070 | * strings of the maximum length allowed by NTFS, which is NTFS_MAX_NAME_LEN | |
3071 | * (255) Unicode characters + a terminating NULL Unicode character. | |
3072 | */ | |
64419d93 | 3073 | struct kmem_cache *ntfs_name_cache; |
1da177e4 | 3074 | |
7fafb8b6 | 3075 | /* Slab caches for efficient allocation/deallocation of inodes. */ |
64419d93 PE |
3076 | struct kmem_cache *ntfs_inode_cache; |
3077 | struct kmem_cache *ntfs_big_inode_cache; | |
1da177e4 LT |
3078 | |
3079 | /* Init once constructor for the inode slab cache. */ | |
51cc5068 | 3080 | static void ntfs_big_inode_init_once(void *foo) |
1da177e4 LT |
3081 | { |
3082 | ntfs_inode *ni = (ntfs_inode *)foo; | |
3083 | ||
a35afb83 | 3084 | inode_init_once(VFS_I(ni)); |
1da177e4 LT |
3085 | } |
3086 | ||
3087 | /* | |
3088 | * Slab caches to optimize allocations and deallocations of attribute search | |
3089 | * contexts and index contexts, respectively. | |
3090 | */ | |
64419d93 PE |
3091 | struct kmem_cache *ntfs_attr_ctx_cache; |
3092 | struct kmem_cache *ntfs_index_ctx_cache; | |
1da177e4 | 3093 | |
e750d1c7 | 3094 | /* Driver wide mutex. */ |
4e5e529a | 3095 | DEFINE_MUTEX(ntfs_lock); |
1da177e4 | 3096 | |
454e2398 DH |
3097 | static int ntfs_get_sb(struct file_system_type *fs_type, |
3098 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 3099 | { |
454e2398 DH |
3100 | return get_sb_bdev(fs_type, flags, dev_name, data, ntfs_fill_super, |
3101 | mnt); | |
1da177e4 LT |
3102 | } |
3103 | ||
3104 | static struct file_system_type ntfs_fs_type = { | |
3105 | .owner = THIS_MODULE, | |
3106 | .name = "ntfs", | |
3107 | .get_sb = ntfs_get_sb, | |
3108 | .kill_sb = kill_block_super, | |
3109 | .fs_flags = FS_REQUIRES_DEV, | |
3110 | }; | |
3111 | ||
3112 | /* Stable names for the slab caches. */ | |
3113 | static const char ntfs_index_ctx_cache_name[] = "ntfs_index_ctx_cache"; | |
3114 | static const char ntfs_attr_ctx_cache_name[] = "ntfs_attr_ctx_cache"; | |
3115 | static const char ntfs_name_cache_name[] = "ntfs_name_cache"; | |
3116 | static const char ntfs_inode_cache_name[] = "ntfs_inode_cache"; | |
3117 | static const char ntfs_big_inode_cache_name[] = "ntfs_big_inode_cache"; | |
3118 | ||
3119 | static int __init init_ntfs_fs(void) | |
3120 | { | |
3121 | int err = 0; | |
3122 | ||
3123 | /* This may be ugly but it results in pretty output so who cares. (-8 */ | |
3124 | printk(KERN_INFO "NTFS driver " NTFS_VERSION " [Flags: R/" | |
3125 | #ifdef NTFS_RW | |
3126 | "W" | |
3127 | #else | |
3128 | "O" | |
3129 | #endif | |
3130 | #ifdef DEBUG | |
3131 | " DEBUG" | |
3132 | #endif | |
3133 | #ifdef MODULE | |
3134 | " MODULE" | |
3135 | #endif | |
3136 | "].\n"); | |
3137 | ||
3138 | ntfs_debug("Debug messages are enabled."); | |
3139 | ||
3140 | ntfs_index_ctx_cache = kmem_cache_create(ntfs_index_ctx_cache_name, | |
3141 | sizeof(ntfs_index_context), 0 /* offset */, | |
20c2df83 | 3142 | SLAB_HWCACHE_ALIGN, NULL /* ctor */); |
1da177e4 LT |
3143 | if (!ntfs_index_ctx_cache) { |
3144 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", | |
3145 | ntfs_index_ctx_cache_name); | |
3146 | goto ictx_err_out; | |
3147 | } | |
3148 | ntfs_attr_ctx_cache = kmem_cache_create(ntfs_attr_ctx_cache_name, | |
3149 | sizeof(ntfs_attr_search_ctx), 0 /* offset */, | |
20c2df83 | 3150 | SLAB_HWCACHE_ALIGN, NULL /* ctor */); |
1da177e4 LT |
3151 | if (!ntfs_attr_ctx_cache) { |
3152 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", | |
3153 | ntfs_attr_ctx_cache_name); | |
3154 | goto actx_err_out; | |
3155 | } | |
3156 | ||
3157 | ntfs_name_cache = kmem_cache_create(ntfs_name_cache_name, | |
3158 | (NTFS_MAX_NAME_LEN+1) * sizeof(ntfschar), 0, | |
20c2df83 | 3159 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
3160 | if (!ntfs_name_cache) { |
3161 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", | |
3162 | ntfs_name_cache_name); | |
3163 | goto name_err_out; | |
3164 | } | |
3165 | ||
3166 | ntfs_inode_cache = kmem_cache_create(ntfs_inode_cache_name, | |
3167 | sizeof(ntfs_inode), 0, | |
20c2df83 | 3168 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, NULL); |
1da177e4 LT |
3169 | if (!ntfs_inode_cache) { |
3170 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", | |
3171 | ntfs_inode_cache_name); | |
3172 | goto inode_err_out; | |
3173 | } | |
3174 | ||
3175 | ntfs_big_inode_cache = kmem_cache_create(ntfs_big_inode_cache_name, | |
3176 | sizeof(big_ntfs_inode), 0, | |
4b6a9316 | 3177 | SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
20c2df83 | 3178 | ntfs_big_inode_init_once); |
1da177e4 LT |
3179 | if (!ntfs_big_inode_cache) { |
3180 | printk(KERN_CRIT "NTFS: Failed to create %s!\n", | |
3181 | ntfs_big_inode_cache_name); | |
3182 | goto big_inode_err_out; | |
3183 | } | |
3184 | ||
3185 | /* Register the ntfs sysctls. */ | |
3186 | err = ntfs_sysctl(1); | |
3187 | if (err) { | |
3188 | printk(KERN_CRIT "NTFS: Failed to register NTFS sysctls!\n"); | |
3189 | goto sysctl_err_out; | |
3190 | } | |
3191 | ||
3192 | err = register_filesystem(&ntfs_fs_type); | |
3193 | if (!err) { | |
3194 | ntfs_debug("NTFS driver registered successfully."); | |
3195 | return 0; /* Success! */ | |
3196 | } | |
c002f425 | 3197 | printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n"); |
1da177e4 LT |
3198 | |
3199 | sysctl_err_out: | |
3200 | kmem_cache_destroy(ntfs_big_inode_cache); | |
3201 | big_inode_err_out: | |
3202 | kmem_cache_destroy(ntfs_inode_cache); | |
3203 | inode_err_out: | |
3204 | kmem_cache_destroy(ntfs_name_cache); | |
3205 | name_err_out: | |
3206 | kmem_cache_destroy(ntfs_attr_ctx_cache); | |
3207 | actx_err_out: | |
3208 | kmem_cache_destroy(ntfs_index_ctx_cache); | |
3209 | ictx_err_out: | |
3210 | if (!err) { | |
c002f425 | 3211 | printk(KERN_CRIT "NTFS: Aborting NTFS filesystem driver " |
1da177e4 LT |
3212 | "registration...\n"); |
3213 | err = -ENOMEM; | |
3214 | } | |
3215 | return err; | |
3216 | } | |
3217 | ||
3218 | static void __exit exit_ntfs_fs(void) | |
3219 | { | |
1da177e4 LT |
3220 | ntfs_debug("Unregistering NTFS driver."); |
3221 | ||
3222 | unregister_filesystem(&ntfs_fs_type); | |
1a1d92c1 AD |
3223 | kmem_cache_destroy(ntfs_big_inode_cache); |
3224 | kmem_cache_destroy(ntfs_inode_cache); | |
3225 | kmem_cache_destroy(ntfs_name_cache); | |
3226 | kmem_cache_destroy(ntfs_attr_ctx_cache); | |
3227 | kmem_cache_destroy(ntfs_index_ctx_cache); | |
1da177e4 LT |
3228 | /* Unregister the ntfs sysctls. */ |
3229 | ntfs_sysctl(0); | |
3230 | } | |
3231 | ||
3232 | MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>"); | |
8331191e | 3233 | MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2007 Anton Altaparmakov"); |
1da177e4 LT |
3234 | MODULE_VERSION(NTFS_VERSION); |
3235 | MODULE_LICENSE("GPL"); | |
3236 | #ifdef DEBUG | |
3237 | module_param(debug_msgs, bool, 0); | |
3238 | MODULE_PARM_DESC(debug_msgs, "Enable debug messages."); | |
3239 | #endif | |
3240 | ||
3241 | module_init(init_ntfs_fs) | |
3242 | module_exit(exit_ntfs_fs) |